The cost of papering the four walls of a room 12 m long at the rate of 1.45 per sq. m is 365.40 and the cost of matting the floor at the rate of 95 paise per sq. m is 102.60. Find the height of the room.
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Answer:
length of room (l)=12m
area of floor =l×b=12×b
Total cost of matting floor =12×b×3.50=378
42b=378
b=9m
Area of walls of the room =2h(l+b)
=2h(12+9)
=42hm
2
Total cost of papering walk =42h×6.50=1638
273h=1638
h=6m.
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