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A closed iron tank 12mlong, 9m …

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A closed iron tank 12mlong, 9m wide, and4 deep is to be made . Determine the cost of iron sheet used at the rate of RS5 PER METRE,THE SHEET BEING 2m wide

Posted by Rajbeer Kaur 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 5 years, 5 months ago

For tank : l = 12 m, b = 9 m, h = 4 m
∴ Total surface area of the tank = 2(l × b + b × h + h × l)
= 2(12 × 9 + 9 × 4 + 4 × 12)
= 2(108 + 36 + 48)
= 2(192) = 384 m²
Width of the iron sheet = 2m
∴ Cost of the iron sheet = {tex}{384\over2}*5{/tex} = Rs. 960

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CBSE > Class 09 > Mathematics