Question

The outer radius of a pipe is 12.5 cm and it is 21 m long.Find the cost of painting the outer surface at RS. 50 per meter square.

Answer 1

Answer:

Step-by-step explanation:

Cost = volume of cylinder*50

Answer 2

Step-by-step explanation:

Radius-12.5 height-21

1. outer surface area=2paiRh=2×22/7×12.5cm×21m(if point will be removed 10 will come in down and cm convert into meter we will divide 100 )so,
2. 2×22×125/10×100×3
3. 16500/1000
4. so,the cost is 16500×50=825000/1000=825.000
5. we can right it 825...