Powers and Roots Practice Test 2

Question : 4 of 40

Marks: +1, -0

Three fifth of the square of a certain number is 126.15, then the number is:

Solution:

Let, the number be x,
Then,

3/5×x^2=126/15

⇒x^2=5/3×126.15

⇒x^2=210.25

⇒x=√210.25=14.5

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