A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?

A. 0.510-6 Nm-2

B. 0.210-6Nm-2

C. 5106 Nm-2

D. 2108 Nm-2

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