Q 10. A thin walled spherical shell is subjected to an internal pressure. If the radius of
the shell is increased by 1% and the thickness is reduced by 1%, with the internal
pressure remaining the same, the percentage change in the circumferential (hoop)
stress is
(A) 0
(B) 1
(C) 1.08
(D) 2.02
Answer: (D)
Explanation: