A room is 8 m long,3.5 m wide and 3.4 m high. It has a door 1.4m by 2.5 m and a window 2m by 1.5m Findthe cost of papering its walls at 25 rupee per metre with a paper 50cm wide.
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T.S.A of Room=2(8×3.5+3.5×3.4+3.4×8)
=94.3sq.m
now...Area of Door=length × breadth
1.4×2.5=3.5sq.m
then
area of window=l×b
2×1.5=3sq.m
adding area of door nd window
3.5+3=6.5 Sq.m
T.S.A - Total area of window nd door
94.3-6.5=87.5sq.m
Cost=87.5×25=₹2187.5
=94.3sq.m
now...Area of Door=length × breadth
1.4×2.5=3.5sq.m
then
area of window=l×b
2×1.5=3sq.m
adding area of door nd window
3.5+3=6.5 Sq.m
T.S.A - Total area of window nd door
94.3-6.5=87.5sq.m
Cost=87.5×25=₹2187.5
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