Question

The difference between outside and inner surface areas of a pipe 7m long is 88cm2. If R+r =4cm, where R and r are the inner and outer radii respectively, find R and r​

Answer 1

Answer:

R=3 and r=1

Step-by-step explanation:

we know that the curve surface area of pipe=2×22/7×r×h

therefore,

2×22/7×R×7-2×22/7× r ×7 =88

R-r=2

R+r=4

hence, R= 3 r=1