Maths-
General
Easy
Question
The surface area of a cuboid is 3600 sq m. If its dimensions are in the ratio 4:2:2, find its volume.
- 430 cu m
- 421 cu m
- 432 cu m
- 411 cu m
The correct answer is: 432 cu m
let the dimensions of the cuboid be 4x,2x,2x.
surface area of cuboid
=2[4x×2x + 2x×2x + 2x×4x]
=2[8x2 + 4x2 + 8x2]
=2[20x2]
=40x2
According to the question,
40x2=3600
X2 =3600/40
X2=9
X=(9)
X=3
Dimensions =12m , 6m , 6m
Volume= 12×6×6
Volume= 432 cu m
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