Question

Sum of square of first number and cube of second number together in 568, Also square of the second number to 15 loss than square of 8. What is the value of three =-680 of the first number ? (assuming both the numbers are positive ).

• A. 18
• B. 8
• C. 9
• D. 10

Answer 1

The correct option is C 9

Let the first number be $x$ and the second number be $y$

$\therefore$ $y^2=8^2-15=64-15=49$

Also $x^2+7^2=568$

$\Rightarrow$ $x=225$

$\Rightarrow$ $x=15$

$\therefore$ $15\times \frac{3}{5}=9$