Question

The inner diameter of a circular well is 3.5 m . The depth of the well is 15 m. Find the cost of plastering the inner curved surface at the rate of rs 25 per m^2. plz give answer plz important.

Answer 1

Answer:

Diameter is 3.5

Radius will be 3.5/2=1.75

So we have to calculate inner surface area so apply 2πrh

Area=2xπx1.75x15=164.92875m^2

Rate=164.92875x25=4123.21875 Rs.

Step-by-step explanation:

Answer 2

Diameter=3.5 m

Therefore radius=3.5/2

Height=15 m

Therefore CSA=2⚻rh=2×22/7×3.5/2×15

=2310/14=165 m^2

Therefore required cost=Rs 25×165

=Rs 4125

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