Question

a rectangular examination hall having seat for 500 candidates has to be built so as to allow 4 cubic metres of air and 0.5 square metre floor area per candidate.If the length of the hall is 25m find the height and breadth.

Answer 1

Given area of floor per candidate = 0.5 sq m
Area of floor for 500 candidates = 500 × 0.5 = 250 sq m
Given length of the hall, l = 25 m
Hence l × b = 250   
⇒  25 × b = 250       
∴ b = 10 m
Volume allowed per candidate = 4 cu m
Volume allowed for 500 candidates = 500 × 4 = 2000 cu m
Volume of hall = l × b × h
2000 = 25 × 10 × h
∴ h = 8 m

Answer 2

Answer:

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