If a cuboid of dimensions 32 cm × 12 cm × 9 cm is cut into two cubes of same size, what will be the ratio of the surface area of the cuboid to the total surface area of the two cubes?
A. 32 : 39
B. 24 : 35
C. 37 : 48
D. 65 : 72
Answer: Option D
Solution (By Examveda Team)
Volume of cuboid = 32 × 12 × 9Volume of a cube = 16 × 12 × 9
a3 = 16 × 12 × 9
a = 12
Area of cuboid : Area of two cube
= 2(32 × 12 + 12 × 9 + 9 × 32) : 2 × 6 × 122
= 65 : 72
This Question Belongs to Arithmetic Ability >> Mensuration 3D
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A sphere and a hemisphere have the same volume. The ratio of their curved surface area is:
A. $${2^{\frac{3}{2}}}:1$$
B. $${2^{\frac{2}{3}}}:1$$
C. $${4^{\frac{2}{3}}}:1$$
D. $${2^{\frac{1}{3}}}:1$$
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