A well 2 m in radius and 14 m deep is to be dug. What is the cost of digging the well at Rs. 1.20 per cubic meter?

Rs. 112.20

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Rs. 110.20

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Rs. 220.10

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Rs. 211.20

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Solution

The correct option is D Rs. 211.20
Volume of well V= $π r^{2} h$
Given h=14 m,r=2 m
$∴$ V= $\frac{22}{7} \times 2 \times 2 \times 14 = 176 m^{3}$
Cost of digging 1 $m^{3}$ =Rs 1.20
Cost of digging 176 $m^{3}$ =176 $\times$ 1.20=Rs. 211.20'

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A well 2 m in radius and 14 m deep is to be dug. What is the cost of digging the well at Rs. 1.20 per cubic meter?

The correct option is D Rs. 211.20Volume of well V=πr2hGiven h=14 m,r=2 m∴ V=227×2×2×14=176m3Cost of digging 1m3=Rs 1.20Cost of digging 176m3=176×1.20=Rs. 211.20'

The correct option is D Rs. 211.20
Volume of well V= $π r^{2} h$
Given h=14 m,r=2 m
$∴$ V= $\frac{22}{7} \times 2 \times 2 \times 14 = 176 m^{3}$
Cost of digging 1 $m^{3}$ =Rs 1.20
Cost of digging 176 $m^{3}$ =176 $\times$ 1.20=Rs. 211.20'