A cuboidal box of dimensions 3x2x1.5 (in m) has mass of 20.7 kg. Find the increase in it's mass if the length of box is increased to 5m.
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Answer:
Area =2(lb+lh+lh)
=2(250×125+250×75+125×75)
=2(250×200+125×75)
=2×50000+250×75
=100000+18750
=118750cm
2
=11.875m
2
∴ Cost = Area × Rate
=11.875×4Rs
=47.5Rs
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