The ratio between the sides of a room is 3 2 The cost of white washing the ceiling of the room at 5 ...........

Quantitative Aptitude ( CCS) Mensuration 3D

The ratio between the sides of a room is 3:2. The cost of white washing the ceiling of the room at 5 Rs per square metre is Rs. 2500 and the cost of papering the walls at Rs. 2 per square metre is Rs. 960. The height of the room is?

4.8 m

6.5 m

3.5 m

8.5 m

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Explanation:

Answer & Explanation
Answer – 1. 4.8 m
Explanation :
Area of Ceiling = Total Cost / Cost of 1 sq. Unit
= 2500/5 = 500
l:b = 2x:3x
l*b = 5x2 = 500
l = 30m & b = 20 m
Area of the 4 wall = 960/2 = 480
Height = 480 / 2(30 + 20) = 4.8m