Question

The inner diameter of a circular well is 3.5 m. It is 10 m deep. Find
(1) its inner curved surface area,
7.
(i) the cost of plastering this curved surface at the rate of 7 40 per m.
In a hot water heating system th​

Answer 1

Step-by-step explanation:

1. given: d= 3.5 m, therefore r = 3.5/3

h= 10 m

therefore, CSA = 2πrh= 2×π×3.5/2× 10

= 35π= 110

2. rate= 7.40 rs / m

cost= 8140rs