A closed tank 12m x 9m x 4m is to be made. Find the cost of iron sheet used at Rs. 5 per meter, the sheet being 2m wide.
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first...take TSA of the tank...then multiply the rate ie 5rs/m...then divide by 2 as its width is 2...then your answer will come
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TSA of the tank = 2( LB + BH + LH)
=2(12×9 + 9×4 + 12×4)
= 2(108 +36 +48) = 384 m²
now , length = TSA/ wide = 384/2 = 192 m
now, Cost = Rs 5×192 = Rs 960
=2(12×9 + 9×4 + 12×4)
= 2(108 +36 +48) = 384 m²
now , length = TSA/ wide = 384/2 = 192 m
now, Cost = Rs 5×192 = Rs 960
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