Q70 A body is projected away from Earth surface with a speed thrice its escape velocity. What will be speed of body at infinity if its escape velocity is 15 km/sec?
Ops: A. 40.42 km/sec
B. 42.42 km/sec
C. 32.33 km/sec
D. O 31.45 km/sec
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Answer:40.42
Explanation:
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