Question

( a train takes 1 hour to go from one station to the
other. It travels at a speed of 30 km/h for the
first half hour and at the speed of 40 km/h for
the next half hour. The average speed of the
train is:
(a) 45 km /h
(b) 35 km/h
(c) 40 km /h
(d) none of these
​

Answer 1

Answer:

B

Explanation:

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