A hall is 22 m long, 14 m broad and 8 m high. It has four doors each 2.6 m by 1.5 m and four windows each 1.5 m by 1 m. Find the cost of papering the walls with 80 cm wide paper at 70 paise per m.
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Answer:
Rs. 819.28.
Step-by-step explanation:
L=22m, B=14m, H=8m
Dorr: l=2.6m,h=1.5m
window: l=1.5m,h=1m
Area of doors=4(l×h)
=4(2.6×1.5)
=15.6m
2
Area of windows=4(l×h)
=4(1.5×1)
=6m
2
TSA of room
=2(LB+BW+HL)
=2[22×14+14×8+8×22]
=2[308+112+176]
=1192m
2
Remaining area =1192−(15.6+6)
=1192−21.6
=1170.4m
2
Cost of papering=70 paise/m
=
100
70
Rs. .m
∴
Cost of papering the room
=1170.4×
10
7
=Rs. 819.28.
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