Question

A diameter of a pipe of lenth 20m is 56 cm. find the cost of painting the surface of the pipe at the rate of12rs per length

Answer 1

Diameter=56cm
Radius=56/2=28cm
Circumference=2πr=2×22/7×28=176cm
Lenght of Pipe=20m=2000cm
Area of Pipe=2000×176=3,52,000
Cost of Painting=Rs12/per m²
=12×3,52,000
=Rs 42,24,000

Answer 2

Answer:

Step-by-step explanation:

Diameter=56cm

Radius=56/2=28cm

Circumference=2πr=2×22/7×28=176cm

Lenght of Pipe=20m=2000cm

Area of Pipe=2000×176=3,52,000

Cost of Painting=Rs12/per m²

=12×3,52,000

=Rs 42,24,000