A. 2.45 x 108 Nm-2
B. 3.45 x 108 Nm-2
C. 4.90 x 108 Nm-2
D. 2.42 x 108 Nm-2

Correct Answer:

Option A = 2.45 x 108 Nm-2

Explanation

Pressure P = F/A
F/πr2

= 7.7 x 10-2
π x (10-5)2

= 7.7 x 10-2
π x 10-10

= 2.45 x 108 Nm-2

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