Question #4695d

1 Answer
Sarthak Mahajan
May 30, 2017

Average speed is defined as the distance travelled by an object in a unit time. The SI unit is #ms^-1# or metre per second.

Explanation:

Average speed is given by the formula:-
# v = x / t # where,
#v# = speed of the object
x = total distance travelled (in metre)
t = time taken (in second)

In the question, # x = 66# miles, which is roughly equal to 106216.704 metre.
and for time taken (t) = 4pm - 2.48 pm = 1 hour and 12 minutes = 4320 second.

Hence, by the given relation, the average speed is:-
# v = 106216.704 / 4320 #
or # v = 24.58 ms^-1 #

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