Question

three fifth of the square of a certain number is 126.15 .Find the number

Answer 1

Here is ur ans


3/5 x^2 =12615/100
x^2 =12615×5/100×3
x^2=4205×5/100
x^2=5×5×841/100
x=root 5×5×841/100


Hope it help u

Answer 2

Answer:

$\red { Required \: number }\green { = 14.5}$

$\green { = \frac{29}{2}}$

Step-by-step explanation:

$Let \:a \: number = x$

$According \: to \:the \: problem \: given$

$\frac{3}{5} x^{2} = 126.15$

$\implies x^{2} = 126.15 \times \frac{5}{3}\\= 42.05 \times 5 \\= 210.25$

$\implies x = \sqrt{210.25} \\= \sqrt{(14.5)^{2}}\\= 14.5$

Therefore.,

$\red { Required \: number }\green { = 14.5 }$

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