Question

A gas pipe is 18 m long. Find the cost of nickel plating on the outer surface of the
pipe at the rate of Rs. 50 per square meter if its meter is 0.4 m.​

Answer 1

The price for coating is 50*2.2608 = 113.04 Rs

Step-by-step explanation:

• Given pipe diameter is = d = 0.4 m
• Lnegth = l = 18 m
• So, plating required = surface area of the pipe = A = $\pi \frac{d^{2} }{4}*l$  
• Plating required = 2.2608 meter square
• Price per square meter = 50 Rs.
• So, the price for coating is 50*2.2608 = 113.04 Rs.
• The price of coating will be equals to the surface of the produce of the area of the pipe and price per square meter.