Question

cost of painting a room of 10×15×8 ft with one door of 2.5×6ft and one window of 4×3 ft at the rate of rs 4 per square meter will be .........

Answer 1

Here's ur answer...

length of the room=12.5m

breadth=9m

height=7m

we have to find it's CSA because we have to find the cost of painting walls.

CSA=2h(l+b)

=2×7(12.5+9)

=14×21.5

=301m²

area of both doors=2(l×b)

=2(2.4×1.5)

=2×3.6

=7.2m²

area of three doors=3(l×b)

=3(1.4×1.2)

=3×1.68

=5.04m²

area of wall without any doors and windows=

301-(7.2+5.04)

=301-12.24

=288.76m²

total cost=288.76×3.5

=₹1010.66

Hope it will help you

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