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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
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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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