The difference between the outside and the inside surface area of a cylindrical pipe 14 cm long is 44 cm2. the pipe is made of 99 cm3 of metal. If R is the outer radius and r is the inner radius of the pipe, then what is (R + r) equal to? (Take π = 22/7)

The difference between the outside and the inside surface area of a cy

1.	The difference between the outside and the inside surface area of a cylindrical pipe 14 cm long is 44 cm2. the pipe is made of 99 cm3 of metal. If R is the outer radius and r is the inner radius of the pipe, then what is (R + r) equal to? (Take π = 22/7)
A.	9 cm
B.	7.5 cm
C.	6 cm
D.	4.5 cm
Answer» E.