Question

Which is greater 3√15 or 4√20

Answer 1

√15 = 3.872...

√20 = 4.472...

3√15 = 3(3.872.....) = 11.618.....

4√20 = 4(4.472.....) = 17.8885....

We can clearly see that 4√20 is greater.

So 4√20 is greater than 3√15.

:)

Answer 2

Concept:

If the number under square root is greater then the value of square root will be greater.

Square root of a number suggests that square of which number is equal to that number under root.

Given:

Given square roots are 3√15 and 4√20

Find:

We have to find which one of the above is greater.

Solution:

If we calculate and make all the number under square root for both the given number we have

3√15 = √9*√15 = √(9*15) = √135

4√20 = √16*√20 = √(16*20) = √320

Since 320 > 135 so it follows √320 > √135

That is 4√20 > 3√15

Hence 4√20 is the greater among the given numbers.

#SPJ2