Volumes Practice Test 4

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Question : 10 of 16

Marks: +1, -0

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

m^3

. Find the breadth of the wall.

25 cm
30 cm
35 cm
40 cm

Solution:

Here, 5b = h
∴ b =

h/5

and also l = 8h
Now,

8h × h/5 × h

= 12.8
⇒

h^2

=

{12.8×5}/8

= 8
∴ h = 2m
Hence, breadth of the wall =

h/5

=

2/5 m

=

2/5 × 100

= 40 cm

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