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Subjects
Science CBSE
Class 9
Motion
Textbook questions
58.
NCERT Exemplar XII
Exercise condition:
3
m.
A motorcyclist drives from A to B with a uniform speed of
30\ km\ h^{-1}
and returns back with a speed of
20\ km\ h^{-1}
. Find its average speed.
The formula to calculate the
average speed
is,
Average\ speed\ =\ \frac{Total\ distance}{Total\ time}
Average\ speed\ =\ {Total\ time} \times {Total\ distance}
Average\ speed\ =\ \frac{Total\ time}{Total\ distance}
Average speed
=
Km\ h^{-1}
(
Note
:
Enter your answers with no decimal places
)
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