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

The inner diameter of a circular will is 3.5m. It is 10m deep. Find the cost of plastering its inner curved surface at Rs. 4 per square metre.

How many cubic metres of earth must be dug out to sink a well 22.5m deep and of diameter 7m? Also,find the cost of plastering the inner curved surface at Rs.3 per square metre.

The inner diameter of a circular well is 3.5m . It is 10m diam find inner curved surface area. the cost of plastering this curved surface at the rate of Rs.40 per m^(2)

How many cubic metres of earth must be dogout to sink a well 21 m deep and 6m diameter? Find the cost of plastering the inner surface of the well of Rs.9.50 per m^(2)

A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the piller at the rate of Rs10 per sq. m.

The diameter and height of a cylindrical water tank are 2 m and 14 m respectively. Find the cost of painting its outer curved surface at the rate of Rs. 20 per m^(2) .

The outer diameter of a pipe is 70 cm and it is 21 m long. Find the cost of painting the outer surface of the pipe at the rate of Rs 10 per square metre

A well has to be dug out that is to be 22.5m deep and of diameter 7m. Find the cost of plastering the inner curved surface at Rs 3 per sq.meter.(a) Rs 1465 (b) Rs 1475 (c) Rs 1485 (d) Rs 1495

A cylindrical pillar is 50cm in diameter and 3.5m in height.Find the cost of painting the curved surface of the pillar at the rate of Rs.12.50 per m^(2)

An open metallic conical tank is 6m deep and itscircular top has diameter of 16m. Find the cost oftin plating its inner surface at the rate of 0.8 per 100cm2. (Take pi=3.14)