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प्रश्न
The cost of constructing a wall 8 m long, 4 m high and 10 cm thick at the rate of Rs. 25 per m3 is
विकल्प
Rs. 16
Rs. 80
Rs. 160
Rs. 320
उत्तर
Dimensions of the wall are,
Length (l) = 8 m
Breadth (b) = 20 cm
= 0.2 m
Height (h) = 4 m
Volume of the hall,
V= lbh
= 8 × 4 × 0.2
= 6.4 m3
Cost of building the wall at the rate of Rs. 25/m3,
=25 × v
=Rs. (25 × 6.4)
= Rs . 160
The cost of building the wall is Rs.160 .
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