Question

a well with 7 m diameter is 10m deep. find the cost of plastering the inner curved surface at the rate of rs. 30 per m sq​uare

Answer 1

Answer:

Rs 7752

Step-by-step explanation:

The area was kept in multiple of pi for more precision

Answer 2

Answer:

RS 6600

Step-by-step explanation:

$csa \: of \: cylinder \: is = 2\pi \: r \: h$

$= 2 \times \frac{22}{7} \times \frac{7}{2} \times 10$

$= 22 \times 10$

$220 \: {m}^{2}$

$220 {m }^{2} \times 30rs$

$= 6600$