The volume of a wall, 5 times as high as it is broad and 8 times as long as it is high, is 12.8 cu. metres. Find the breadth of the wall.

Options

A. 30 cm
B. 40 cm
C. 22.5 cm
D. 25 cm

Answer

B

Explanation

Let breadth = x cm .Then height = 5x cm and length = 40 x cm
`therefore 40 xx x xx5x= 12.8 xx 100 xx 100 xx100`
`rArr x^3 = 64000=(40 xx 40 xx 40)rArr x 40`