Question:
By running at a speed of 8 km/h how much distance a bus will cover in 9 second?
Correct Answer
19.98 meter
Solution And Explanation
Solution
Given,
Speed = 8 km/h
Time = 9 second
Thus, distance = ?
Here the speed is given in the kilometer per hour while the time is in the second. So, for the ease of calculation, the speed should be converted into meter per second.
Conversion of the speed from kilometer per hour to meter per second
To convert kilometer per hour, the speed is multiplied by 5/18
Therefore, 8 km/h = 8 × 5/18 m/s
= 8 × 5/18 m/s
= 40/18 = 2.22 m/s
Thus, speed = 2.22 m/s
Calculation of distance using formula
Formula to calculate distance when speed and time are given
Distance = Speed × Time
⇒ Distance = 2.22 m/s × 9 s = 19.98 m
Thus, distance = 19.98 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 2.22 meter
∴ In 9 second, the distance covered = 2.22 m × 9 = meter
Thus, distance = 19.98 meter Answer
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(3) If a car is running with a speed of 60 km/h, then how much distance will it cover in 15 minute 20 second?
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