Discussion Forum



1)

Three fifth of the square of certain number is 126.15.What is the number?


A) 210.25

B) 75.69

C) 14.5

D) 145

E) 15.5

Answer:

Option C

Explanation:

Let the umber be x

Given 35x2=126.15

x2=126.15×53

x=√210.25

=14.5