Question

Two fifth of the square of a certain number is 62.5

Answer 1

Answer is √156.25 by considering the unknown number as x

Answer 2

Answer:

12.5

Step-by-step explanation:

Let the number be x.

The square of the number is :

x^2

Two fifths of this is :

2/5x^2

This equals to 62.5

Now :

2/5x^2 = 62.5

x^2 = 156.25

X = square root of 156.25

= 12.5