Question

a roof of dimensions 6.5×5.5 m is covered on all sides by a 1m high wall of width 30cm.The remaining part of the roof is covered with a waterproof covering at 9rs cm

Answer 1

Ans is:260.19
length=6.5m
breadth=5.5m
width of the wall built on the roof=30 cm
(THERE IS N NEED OF THE HIEGHT OF THE WALL)
new length=6.5-0.6=5.9m
new breadth=5.5-0.6=4.9m
(HERE 0.6 IS 60cm SUBTRACTED FROM BOTH LENGTH AND BREADTH)
new are of the roof i.e. the remaining part of the roof=5.9x4.9=28.91m^2
cost of waterproofing this area=28.91x9
(9rs/m^2 GIVEN)
=rs 260.19

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