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Depth of well = 10 m
Cost of painting = Rs 3,300
Rate of painting = Rs 30 /m^2
Inner CSA = Cost / Rate
=> CSA = 3300 / 30
=> Inner CSA = 110 m^2
Now,
=> 2 pi r h = 110
=> 2 × 22 × r × 10 / 7 =110
=> r = 110 × 7 / 22 × 2 × 10
=> r = 11 × 7 / 44
=> r = 7 / 4
=> r = 1.75 m
Diameter of well = 3.5 m
Now,
Volume = pi r^2 h
= 22/7 × 7/4 × 7/4 ×10
= 22× 7 × 7 × 10 / 7 × 4×4
= 11 × 7 × 5 / 4
= 11× 35 /4 m^3
= 11 × 35 /4 × 1000 litres [ 1 m^3 = 1000 Litres
= 385 × 250
= 96250 litres
Cost of painting = Rs 3,300
Rate of painting = Rs 30 /m^2
Inner CSA = Cost / Rate
=> CSA = 3300 / 30
=> Inner CSA = 110 m^2
Now,
=> 2 pi r h = 110
=> 2 × 22 × r × 10 / 7 =110
=> r = 110 × 7 / 22 × 2 × 10
=> r = 11 × 7 / 44
=> r = 7 / 4
=> r = 1.75 m
Diameter of well = 3.5 m
Now,
Volume = pi r^2 h
= 22/7 × 7/4 × 7/4 ×10
= 22× 7 × 7 × 10 / 7 × 4×4
= 11 × 7 × 5 / 4
= 11× 35 /4 m^3
= 11 × 35 /4 × 1000 litres [ 1 m^3 = 1000 Litres
= 385 × 250
= 96250 litres
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