Explore topic-wise InterviewSolutions in .

Let tens place digit = nUnit place digit = 2n

Number = 10*n + 2n = 12n

If digits are interchanged then number becomes = 10*2n + n = 21n

As per given condition12n + 18 = 21n9n = 18n = 18/9 = 2

Then number = 12n = 12*2 = 24

sorry i didn't read question properly

[f(X)]^2/2is the right answer.

Like if you find it useful

1) The interior and the exterior angles

make a linear pair:add up to make 180°.

180° - 165° = 15° measure of one ext. angle

2) the sum of the exterior angles of any convex polygon is 360°

360°÷ 15° = 24 exterior angles

3) the number of exterior angles = the number of interior angles = the number of sides in any convex polygon

4) Therefor there are 24 sides in this regular polygon

Please post questions in English language only

There are 4 side in rectangle

there are 4 sides in the rectangle

Ingeometry, acubeis athree-dimensionalsolid object bounded by sixsquarefaces,facetsor sides, with three meeting at eachvertex.

Let w and m represent women and men respectively

2W + 5M can do 1 work in 4 days

2W + 5M can do 1/4 work in 1 days

Also,

3W + 6M can do 1 work in 3days

3W + 6M can do 1/3 work in 1day

Then, equating work with men and women

2W + 5M =1/4.(i)

Then,

3W + 6M=1/3-(ii)

Or, 3(W + 2M)=1/3

Or,W + 2M =1/9-(iii)

Then subtracting (i) from (ii)

3W + 6M=1/3

-2W - 5M =-1/4)

W + M=1/3 -1/4

W + M= 1/12...............(iv)

Also,

Subtracting (iv) from (iii)

W + 2M =1/9

-W - M=-1/12

M = 1/9 – 1/12

Or, M=1/36

So subsituting m=1/36 in equation (iv)

W + 1/36 = 1/12

Or,W = 1/12 – 1/36

Hence, W=1/18

I men alone can do (1/36) work in 1 day

1 men alone can do 1 work in 36 days

Also,

1 women alone can do (1/18) in 1 day

1 women alone can do 1 work in 18 days

Cube has6 faces,12edges, and8 vertices.

Let the number be 10x + yx = 4y . . . . . (1)10x + y - 54 = 10y + x9x - 9y = 54x - y = 6Substitute from (1)4y - y = 6 3y = 6 y = 2 x = 4 × 2 = 8The number is 82

GIVEN p= 3000, r = 6% and t = 1/2 years

so, interest will be P*R*T/100 = (3000*6*1/2)/100 = 90rs.

Answer: 1653000 RS.

Step-by-step explanation:

So borrowed amount of 3800 rs at the rate of 14.5 % per annum or month he returns it after 2.5 years or 30 months . Thats equal to 30 annums

So 30 months = 30 annums

And rate = 14.5 x 30 = 435%

Now he would return 435x3800 =1653000 rs

RS 1377.50,₹5177.50

x^2 +y^ 2 = c which is the equation of circle is the correct answer of the given question

first you need to learn the basic then only you can solve this !!

The formula for the no. of diagonals of a ’n' sided polygon is n(n-3)/2 .

It works for triangle (0 diagonals) , quadrilateral (2 diagonals) , pentagon (5 diagonals) and for every another polygon.

Let's come to the problem.

No. Of diagonals = n(n-3)/2 = 27

n(n-3) = 54

n^2 - 3n -54 = 0

n^2 - 9n + 6n - 54 = 0

n(n-9) + 6(n-9) = 0

(n-9)(n+6) = 0

n = 9, -6

(excluding -6)

n = 9

The polygon has 9 sides.

It is a Nonagon.

why there is single n and -6 excluded

it has seven sides mean poly means seven

Theres an error in your question.

man and a boy can complete a work together in 24 dayswork done by a man and a boy in 1 day = 1/24

In the second case, a man and boy work together for 20 days.work completed = 20/24 = 10/12 = 5/6remaining work = 1/6

1/6 of the work is completed by 1 man in 6 daysor a man can complete the entire work in 36 days=> work done by a man in 1 day = 1/36

work done by a boy in 1 day = 1/24 - 1/36 = 1/72a boy alone can complete the work in 72 days

The number of diagonals in a polygon is n(n-3)/2.

So a decagon has 10(10–3)/2 = 10*7/2 = 35 diagonals.

Formula for calculating number of diagonals of any polygon of n sides = n*(n - 3)/2

So here it's a decagon ,that is a 10 sided polygon, So n = 10.

Simply plug value of n into the formula , you get: 10*(10-3)/2 = 35.

𝑺𝒊𝒅𝒆 = 66𝒄𝒎

𝑬𝒙𝒑𝒍𝒂𝒏𝒂𝒕𝒊𝒐𝒏:The circumference of the ring = 2πr = 2 × (22/7) × 42 = 22 × 12This will be equal to the perimeter of square 4a = 22 × 12 a = (22 × 12)/4 a = 66cm

What is the side of the square

Let the time taken by man be x daysLet time taken by boys be y days

work done by 1 man in one day = 1/x

work done by 1 boy in one day = 1/y

8/x+12/y = 1/10.........eq(1)

6/x+ 8/y = 1/14..........eq(2)

Let u=1/x & v=1/y

8u + 12v = 1/10............eq(3)

6u + 8v = 1/14..............eq(4)

Multiplying eq(3) by 2 & eq(4) by 3

16u + 24v = 2/10.........eq(5) 18u + 24v = 3/14.........eq(6)

subtract eq(5) - eq(6) -2u = -3/14 + 2/10-2u = (-3×10 + 2×14)/140-2u = (-30 + 28)/140-2u = -2/140u = 1/140

put this value in eq(5) 16u + 24v = 2/1016×1/140 + 24v = 1/54/35 + 24v = 1/524v = 1/5 - 4/3524v = (1×7 - 4)/3524v = (7 - 4)/3524v = 3/35v = 3/35×24v = 1/280

Now, u = 1/x1/140 = 1/xx = 140

v = 1/y1/280 = 1/yy = 280

Therefore, A man complete the work in 140 days. A boy can complete the work in 280 days.

Let W be the workNo. of days taken by a man alone to complete the work be x days &no. of days taken by a boy alone to complete the work be y daysTherefore one days work by a man = W/xand one days work by a boy = W/y CASE 1one days work of 8 men and 12 boys = 8 W/x+12 W/yand ten days of work by 8 men and 12 boys = Wtherefore, 10 [8 W/x +12 W/y]=W80 W/x+120 W/y = w80/x + 120/y = 1............(1)

CASE 2following the same steps according to the given condition we get the 2 n d equation as84/x+112/y = 1.............. (2)

take 1/x =u and 1/y=v80 u+ 120 v=1...............(3)84 u+ 112 v=1...............(4)

Multiply eq(3) by 21 and eq(4) by 201680 u+2520 v = 21........ (5)1680 u+2240 v = 20.........(6) solving we will get v = 1/280substituting value of v in (3)80 u +120 *1/280 =180 u= 1-3/780 u= 7-3/7 {l c m}80 u =4/7u= 4/7*80u= 1/140

when v = 1/2801/y=1/280therefore y = 280

when u = 1/1401/x = 1/140therefore x = 40

therefore no.of days taken by a man alone to complete the work = x days = 140 days &no. of days taken by a boy alone to complete the work = y days = 280 days

(2) is correct option

4 men in 4 day=4 cupboards14 men in 14 dayscupboards are=(14×14×4)/16=49

The order of the differential equation is 2 because d²y/dx² exists.

Please hit the like button

but we need to the general solution .and my question is different u had solved an another question

Answer:c)360°A decagon has 10 sides so its interior angles add up to 180(10) - 360 = 1440 degrees. Therefore, on average, each interior angle is 144 degrees and each exterior angle is 36 degrees.

The sum of the exterior angles is 10 x 36 = 360 degrees.