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Standard XII
Physics
Question
A motorcyclist drives from A to B with a uniform speed of
30
k
m
h
−
1
and returns with a speed of
20
k
m
h
−
1
. Find the average speed.
25
k
m
h
−
1
24
k
m
h
−
1
12
k
m
h
−
1
37
k
m
h
−
1
A
24
k
m
h
−
1
B
25
k
m
h
−
1
C
12
k
m
h
−
1
D
37
k
m
h
−
1
Open in App
Solution
Verified by Toppr
Let the length of the line segment AB be
x
m
The time taken is given as t=distance covered/speed
Total time =
t
1
+
t
2
=
x
30
+
x
20
=
5
x
60
h
Average speed = Total distance/Total time =
2
x
5
x
/
60
=
24
k
m
/
h
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Similar Questions
Q1
A motorcyclist drives from A to B with a uniform speed of
30
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m
h
−
1
and returns with a speed of
20
k
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h
−
1
. Find the average speed.
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Q2
A car travels from A to B at a, speed of
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