Question

Y varies inversly as the square of x,y =1.5 when x=8. Find y when x=5

Answer 1

Answer

x y

8/5 1.5/y

=5/8×1.5/y

Y=8×1.5/5 (by removing point we have

Add a zero in 5it take 50 )

Y=8×15/50

(50 and 15is cut by 5 then 10 which is left by cutting of 50and 8 is cut by 2

=4×3/5

Y= 2.5

=2.5(answer) y=2.5