Question

A well 14m deep is 2m in radius. find the cost of cementing the inner curved surface area at the rate of rs.2 per sq.m.​

Answer 1

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$\large\red{Depth \: of \: the \: well = 14m}$

$\large\green{Radius = 2m} \:$

$\large\pink{Curved \: surface = 2\pi\:rh}$

$\large\orange{ = 2 \times\frac{22}{7} \times 2 \times 14 } \:$

$\large\purple{ = 176}$

$\small\red{Cost \: of \: cementing \: 1 \: square \: metre \: curved \: area= Rs.2}$

$\small\pink{Cost \: of \: cementing \: 176 \: square \: metre \: curved\:area= Rs.2 \times 176}$

$\small\purple{ = Rs.352}$

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Answer 2

Step-by-step explanation:

Inner CSA of well = 2πrh=2×

7

22

×2×14=176m

2

Cost of cementing =Rs(176×2)=Rs.352