A rail 20 m long is prevented from expansion at both end . If the temp – McqOptions

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1.	A rail 20 m long is prevented from expansion at both end . If the temperature is raised by 30 0C, Stress induced in rail is.. E=200 Gpa,α =12x10-6/°C
A.	24 mpa
B.	48mpa
C.	72mpa
D.	94mpa
Answer» D. 94mpa

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