Question

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Q1.A train travels in a straight line at a constant speed of 60 km/h for a particular distance d and then travels another distance equal to 2d in the same direction at a constant speed of 80 km/hr in the same direction as it was in the it was previously going a) What is the average speed of the train during the whole journey​​

Answer 1

Answer:

Let distance from A to B=x km= distance from B to A.

Time taken by train from A to B =

60

x

hr

Time taken by train from B to A =

80

x

hr

Total time taken by train =

60

x

+

80

x

=

240

7x

hr

average speed=

total time

total distance

=

240

7x

2x

=

7

480

km h

−1

Answer 2

Answer:

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