Question

Length of a hall is 20 metre and width 16 metre. The sum of area of floor and roof is equal to the sum of areas of four walls. Find the height and volume of the hall.+

Answer 1

Given l = 20 m and b = 16m

Given areas of floor and flat roof = sum of areas of the four walls

2(lb) = 2(l + b)h

2(20)(16)) = 2(20 + 16)h

640 = 72h

72h = 640

h = 640/72

h = 8.8 square metres

Answer 2

Answer:

given l=20m b=16m

ATQ

area of floor and area of roof=sum of the four walls

=》2(lb)=2h(l+b)

=》640=72h

=》h=640/72

=》h=8.8 m

volume of the hall =l×b×h

=》20×16×8.8

=》2×16×88

=》32×88

=》2816 m cube

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