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speed = distance / time = 150 / 6 = 25 m/s = 25×3600/1000 km/h = 90 km/h

Train length = 150 mTime taken to cross tree = 6 sec

We know,Distance = speed x time

Then speed of train= Distance / time= 150/6 = 25 m/sec= 25*18/5= 18*5 = 90 km/hr

435 meters train travel in crossing the platform

435 metres train travel in crossing the platform

435 m is the correct answer of the given question

The correct answer of this question = 435 metre.

The density of water is approximately 1000 g/L and its molar mass is 18.02 g/mol (or 1/18.02=0.055 mol/g). Therefore, the molar concentration of water is: (H2O) = 1000 g/L / (18.02 g/mol) = 55.5 mol/L.Option (C)

Given:-Lenght of the train=150 mSpeed of the train=60 km/hr=50/3 m/s

Time taken by the train to cover the man standing on the platform=length of the train/it's speed =150 m/(50/3) m/s=9 secs

it is asked for 5 mark

thanks

First, we'll assume that √p + √q is rational, where p and q are distinct primes√p + √q = x, where x is rational

Rational numbers are closed under multiplication, so if we square both sides, we still get rational numbers on both sides.

(√p + √q)² = x²p + 2√(pq) + q = x²2√(pq) = x² - p - q

√(pq) = (x² - p - q) / 2

Now x, x², p, q and 2 are all rational, and rational numbers are closed under subtraction and division. So (x² - p - q) / 2 is rational.

But since p and q are both primes, then pq is not a perfect square and therefore √(pq) is not rational. But this is a contradiction. Original assumption must be wrong.

So √p + √q is irrational, where p and q are distinct primes

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We can also show that √p + √q is irrational, where p and q are non-distinct primes, i.e. p = q

We use same method: Assume √p + √q is rational.√p + √q = x, where x is rational√p + √p = x2√p = x√p = x/2

Since both x and 2 are rational, and rational numbers are closed under division, then x/2 is rational. But since p is not a perfect square, then √p is not rational. But this is a contradiction. Original assumption must be wrong.

So √p + √q is irrational, where p and q are non-distinct primes

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∴ √p + √q is irrational, where p and q are primes

Answer is very big sir

(i ) 900=270(3)+90 270 =90(3)+0 HCF of 900 &270 is 90(ii)38220=196(195)HCF of 196 & 38220 is196

1)Let a and b be any two positive

integers .Then there exists two

unique whole numbers q and r

such that

a = bq + r ,

0 ≤ r < b

******************************************

Now ,

900 and 270 , start with the larger

integer , that is 900. Apply the

Division lemma , we get

900 = 270 × 3 + 90

270 = 90 × 3 + 0

The remainder has now become

zero . Now our procedure stops.

Since the divisor at this stage is 90.

Therefore ,

HCF ( 900 , 270 ) = 90

yes this is the right answer

The solutions are uploaded step by step!

I have numbered it accordingly as the page numbers.

if we put h=0 we will get 0/0 formso using L'hospital rulelim h->0 (2sin(x+h)cos(x+h)-2sinxcosx)/1=2sinxcosx-2sinxcosx=0

speed is distance/timehencespeed will be 10/5/2=4km/hr

The US. athletes Tommie and Carlos protested by raising black gloved clinched fists with no shoes to show black poverty. They were punished by international Olympic association by taking their medal aback. Norman who protested by wearing a human right badge was not included in the Australian team. They all faced legal problems but their action succeeded in gaining international attention for civil rights movement and this proved to be a measure to curb or end the black poverty and discrimination in USA.

f(x) = x/x^2 + 3x + 2

x^2 + 3x + 2 = 0x^2 + 2x + x + 2 = 0x(x + 2) + 1(x + 2) = 0(x + 1)(x + 2) = 0x = - 1, - 2

This means that, whenx=−1or- 2, we have thex^2 + 3x + 2 = 0Implying thatf(x) = x/0which isundefined.

Hence, the domain is all real numbers except−1 and- 2

Also written asDf=(−∞,−2)∪(-1,+∞)

In DNA Adenine-Thymine and Guanine-Cytosine pair together due to the formation of hydrogen bonds between the two bases.

So The answer is option C

Like my answer if you find it useful!

(a+b+c)² = a²+b²+c²+ 2(ab+bc+ac) since (a+b+c)² ≥ 0

so, 0 ≤ 14 + 2(ab+bc+ac)=> (ab+bc+ac)≥ -14/2 ≥ -7

prime numbers other number which are divisible by only 1 and itself . examples are 2,3,5,7,11,13,17 , etc .

prime numbers other number which are division ke by only 1 and itself.Examples are 2,3,5,7,11,13,17 etc.

a number that is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11).

Prime number other number which are divisible by one and itself example 2,3,5,7,110etc

who divided by only itself and 11,2,3,5,7........

1,2,3,5,7.......are correct answer

2,3,5,7,11,13,17,etc.

a number having only two factor i.e 1 and itself only is called a prime number...eg. are 2,3,5,7,11,13,17,19....... and so on

If , students good in math = 72%

Total no. of students= 25

then, percent are used to have 100.

Therefor, 72×25÷100

= 18

Then , no of students good in math = 18

Total no. Of student = 25

Therefore, Students not good in maths = total no. of students - no. Of students good in maths

= 25–18

= 7

The no. Of students not good in maths are 7.

The answer to this question is that there are '3' chairs and '4' guests in a room.

Explanation:If two guests share one chair then only 2 chairs are needed for 4 guests and in this way one chair is vacant.

But when each guest sits on separate chairs, only 3 guests get chairs while the 4th guest remain standing

Galileo found that the acceleration due to gravity (called ``g'') depends only on the mass of the gravitating object and the distance from it. It does not depend on the mass of the object being pulled.

mathematics is very interesting subject

please send right question

This is a textbook of maths for class 8

this is a tent book of mathematics for class 8

20 B + 36 N = 240025 B + 45 N = ? __________________

2400× 24/20× 45/36 = 3600 ans

As she purchased 78kg 650g and used 68kg 150g. So minus the second one from 1st one and the ans will be 10kg 500g

LCM

15= 3*518= 2*3*324= 2*2*2*327= 3*3*336= 2*2*3*3= 1080