A train has a speed of 60 π‘˜π‘š/β„Ž. for the first one hour and 40 π‘˜π‘š/β„Ž for the next half hour. Its average speed in π‘˜π‘š/β„Ž is

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Physics Problems

Question : A train has a speed of 60 π‘˜π‘š/β„Ž. for the first one hour and 40 π‘˜π‘š/β„Ž for the next half hour. Its average speed in π‘˜π‘š/β„Ž is

(A) 50

(B) 53.33

(C) 48

(D) 70

Answer :

Solution :

A train has a speed of 60 π‘˜π‘š/β„Ž. for the first one hour and 40 π‘˜π‘š/β„Ž for the next half hour. Its average speed in π‘˜π‘š/β„Ž is
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