Find the cost of digging a well of diameter 2.8 m and depth 21 m at the rate of Rs 1.75 per m³
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Answered by
16
Diameter of the well is 2.8m. therefore radius of the well = 2.8/2
= 1.4m
Height (depth) of the well is 21m
Volume of the well = πr²h
= 22/7 × 1.4 × 1.4 × 21
= 22 × 1.4 × 1.4 × 3
= 129.36m³
Total cost of digging the well at the rate of ₹1.75 per m³ = 129.36 × 1.75
= ₹226.38
= 1.4m
Height (depth) of the well is 21m
Volume of the well = πr²h
= 22/7 × 1.4 × 1.4 × 21
= 22 × 1.4 × 1.4 × 3
= 129.36m³
Total cost of digging the well at the rate of ₹1.75 per m³ = 129.36 × 1.75
= ₹226.38
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Answered by
8
given D = 2.8 m then r = 1.4m
h = 21 m
volume of well = πr^2h
then
volume = 22/7*1.4*1.4*21 = 129.36m^3
cost for 129.36 m^3 = 1.75*129.36 => 226.38rs
thus cost = 226.38rs
Plz mark as Brainlist if this answer deserves it
h = 21 m
volume of well = πr^2h
then
volume = 22/7*1.4*1.4*21 = 129.36m^3
cost for 129.36 m^3 = 1.75*129.36 => 226.38rs
thus cost = 226.38rs
Plz mark as Brainlist if this answer deserves it
mark as BRAINLIST shreya if it helps u
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