A man went from Kolkata to Digha by a bus in
24 hours. If the speed of the bus be 45 km/hour
find the distance between Kolkata and Digha
A train went from Howrah to Bandel with a speed
of 20 km per hour and then returned from Bandel
to Howrah with a speed of 15 km per hour. Find
the average speed of the train.
Abus crosses a light post, at the side of the road,
in 3 seconds moving with a speed of 4 metres/sec
Find the length of the bus.
Find the time in which a train of length 150 metres
will cross an electric post, if the speed of the train
Answers
Answered by
0
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
Answered by
0
Answer:
ans2
Average speed =
2xy
kmph
x + y
=
2 × 20 × 30
20 + 30
=
2 × 20 × 30
= 24 kmph
50
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