Question

The inner diameter of a circular well is 3.5 m. It is 10 m deep. Find
(i) its inner curved surface area
(ii) The cost of plastering this curved surface at the rate of Rs. 40 per m².

Answer 1

Answer:

inner curved surface area = 110 m²

cost of plastering this curved surface at the rate of Rs. 40 per m² = Rs 4400

Step-by-step explanation:

The inner diameter of a circular well is 3.5 m

Radius = Diameter /2 = 3.5/2 = 1.75 m

inner curved surface area = 2π RH

R = 1.75 m

H = Depth = 10 m

π = 22/7

inner curved surface area = 2 * (22/7) * 1.75 * 10

= 110 m²

Cost of plastering at the rate of Rs. 40 per m².  = 110 * 40

= Rs 4400

cost of plastering this curved surface at the rate of Rs. 40 per m² = Rs 4400

Answer 2

Answer:

Answer is in the photos above

Step-by-step explanation:

hope it helps you mate