Explore topic-wise InterviewSolutions in .

thanku sir

sorry mam

Metal refining:-In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.

Alloy:-An alloy is a combination of metals or of a metal and another element. Alloys are defined by a metallic bonding character. An alloy may be a solid solution of metal elements (a single phase) or a mixture of metallic phases (two or more solutions).

Amalgam:-An amalgam is an alloy of mercury with another metal, which may be a liquid, a soft paste or a solid, depending upon the proportion of mercury.

Let amount of copper be 5x and zinc be 7x

Given5x = 35.5x = 7.1

Weight of zinc = 7*7.1 = 49.7 gm

thanks

n(A U B) = n(A) + n(B) - n(A ∩ B)n(B) = n(A U B) + n(A ∩ B) - n(A) = 29 + 7 - 15 = 21

We know, n(A U B) = n( A) + n(B) - n(A ∩ B)So,29 = 15 + n(B) - 29n(B) = 29 + 14n(B) = 43

b is the right answer

marks in increasing order: 27,32,37,48,50range: 27-50

angles opposite to equal sides are equal.so P and R are equal.so if Q=50P+R=130so each angle is 65°

I don't know of this answer

Like if you find it useful

18 63 and99 right ans

Solution

Let 1 kg of each one of A and B be taken to form 2 kg of C.Gold in 1 kg of A = 7/9, copper in 1 kg of A = 2/9Gold in 1 kg of B = 7/18, copper in 1 kg of B = 11/18Gold in 2 kg of C = (7/9 + 7/18) = 21/18 = 7/6Copper in 2 kg of C = (2/9 + 11/18) = 15/18 = 5/6Ratio of gold and copper in C = 7/6 : 5/6 = 7:5

please like the solution 👍 ✔️

Let one of the angles be x° and the other supplementary angle be (180 - x)°.

It has been given that these two angles are supplementary and are in the ratio 2:7.

∴x/(180-x)=2/7=>7x=2(180-x)=>9x=360=>x=40

∴the two angles are X equals to 40° and the other angle equals to (180°- x) equals to (180°-40°) equals to 140°.

a) 2:7 is smallerb) 22:15 is smaller

90-50=40

angle poq=180-80=100

Let x and y be the two angles of a parallelogram.It is given that one angle istwo-third of its adjacent angle. So, we assume that angle"x" is two-third of angle "y" .which can be written as,x = (2/3). y ........ (1)We also know that the adjacent sides of a parallelogram are supplementary. It means that the sum of adjacent angles is equal to 180.Hence, x + y = 180 ........ (2)Put the value of x from equation (1) in equation (2):(2/3) y + y = 180(2/3 +1) y = 180(5/3) y = 180y = 180. (3/5)y =108Now put this value in equation (2) to get the value of x:x + 108 = 180x = 180 - 108x = 72Hence, the adjacent angles of a parallelogram are 72° and 108°

the day in the month of April=30a machine manufacturers 5782 screws in a day,so total screws =30*5782=173460

In one day number of screws manufactured by machine = 5782

In month of April number of days are 30

Therefore, Number of screws manufactured in month of April= 30*5782= 173460

area=πr^2=3.14×2×2=12.56

area=nr^2=3.14×2×2=3.14×4=12.56

area =π^2=3.4x2x2=12.56

Area of the pot = πr squareArea of the pot = 3.14 × 2×2Area of the pot = 3.14×4Area of the pot = 12.56 sq. feet

area=

thanks

AOB+BOC=180°60°+BOC=180°BOC=180°-60°BOC=120°60°+BOC =180°

BOC=180°-60°

Every day he walks 7.5 hrsSo in three days he walks 7.5×3 =22.5hrsAnd he travelled 65km in these 22.5hrsSo the speed = distance/time = 65/22.5 = 2.88km/hr

Speed of the man will remain same,So time = distance/speed = 156/2.88 = 54 hrs

Everyday he walks 8hrs, so for 54 hrs, he has to walk 54/8 = 6.75 days

Every day he walks 7.5 hrsSo in three days he walks 7.5×3 =22.5hrsAnd he travelled 65km in these 22.5hrsSo the speed = distance/time = 65/22.5 = 2.88km/hr

Speed of the man will remain same,So time = distance/speed = 156/2.88 = 54 hrs

Everyday he walks 8hrs, so for 54 hrs, he has to walk 54/8 = 6.75 days

option b ) reflex angle

hit like if you find it useful

this is a obtuse angle

In triangle ABE and triangle DCF,ANGLE A+ANGLE B+ANGLE E=180(ANGLE SUM PROPERTY)-(1)ANGLE D+ANGLE C+ANGLE F=180(ANGLE SUM PROPERTY)-(2) (1)+(2)ANGLE A+ANGLE B+ANGLE E+ANGLE D+ANGLE C+ANGLE F=180+180ANGLE A+ANGLE B+ANGLE C+ANGLE D+ANGLE E+ANGLE F=360

i) let the angle be x so x+x =90 which x= 45

I want the answer of 3rd part

the angle which is equal to its complement is 45

If 1/10 are rusted in a box of 600 screws it means that 60 are rusted.the probability of finding a food screw is:600-60/600=540/600=9/10so the probability of finding a good screw is 9/10

thanks sir

《AOD=115《BOC=115《DOC=65

P(x,y)

O (0,0)

PO = √(x -0)² + (y-0)²

PO = √(x² + y²)

Total possibility = 4

A = Event of getting Y = 1

P(A) = 1/4

let the distance between A to B be x kmtime(AB)=x/20 hrtime(BA)=x/30 hraverage speed= total distance/ total time =(2x)/(x/20 + x/30) =(2×20×30)/(20+30) =120/5=24 km/hr

At first he goes 200km. Now he goes 2 hours in 60km/h in second time he goes(60*2)=(120)km so his average velocity is =(200+120)/(3+2)=320/5=64km/h

64 km/hr is the best answer of the que

Given: ABCD is a quadrilateral AH, BF, CF, DH are bisectors of∠A,∠B∠C∠D respectively

To prove: EFGH is cyclic quadrilateral

Proof: To prove EFGH is a cyclic quadrilateral, we prove that sum of one pair of opposite angles is 180 degrees.

in triangle AEB

∠ABE +∠ BAE +∠AEB = 180 degrees

∠AEB = 180 degress -∠ABE -∠BAE

∠AEB = 180 degress (1/2∠B +1/2∠A)

∠AEB = 180 degrees -1/2 (∠B +∠A) ....(1)

Now Lines AH and BF intersect

So∠ FEH =∠AEB

∠ FEH = 180 degrees - 1/2 (∠B +∠ A ) ....(2)

Similarly we can prove that∠FGH = 180 degrees = 1/2 (∠C +∠ D).... (3)

addding(2) and (3)

∠FEH +∠ FGH = 180 degrees -1/2 (∠A +∠D) +180 degress - 1/2 (∠C +∠ B)

∠FEH +∠FGH = 180 degrees + 180 Degrees - 1/2 (∠A +∠D +∠C +∠B)

∠ FEH +∠FGH = 360 degrees - 1/2 (∠A +∠B +∠C +∠D)

∠ FEH +∠ FGH = 360 degrees -1/2 (∠A +∠B +∠C +∠D)

Since ABCD is a quadrilateralSum of angles of Quadrilateral = 360degress∠A +∠ B +∠c +∠ D = 360 Degrees

∠FEH +∠FGH = 360 degrees -1/2 x 360 degrees

∠ FEH + FGH = 360 degrees - 180 degrees

∠ FEH +∠ FGH = 180 degrees

Thus in EFGHSince sum of one pair of opposite angles is 180 degrees