Question:
By running at a speed of 50 km/h how much distance a motor bike will cover in 8 second?
Correct Answer
111.12 meter
Solution And Explanation
Solution
Given,
Speed = 50 km/h
Time = 8 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, 50 km/h = 50 × 5/18 m/s
= 50 × 5/18 m/s
= 250/18 = 13.89 m/s
Thus, speed = 13.89 m/s
Calculation of distance using formula
Formula to calculate distance when speed and time are given
Distance = Speed × Time
⇒ Distance = 13.89 m/s × 8 s = 111.12 m
Thus, distance = 111.12 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 13.89 meter
∴ In 8 second, the distance covered = 13.89 m × 8 = meter
Thus, distance = 111.12 meter Answer
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(3) By running at a speed of 25 km/h how much distance a bus will cover in 9 second?
(4) By running at a speed of 31 km/h how much distance a bus will cover in 9 second?
(5) If a cyclist covers a distance of 28 km in 7 hours, then how much distance will he cover in 5 hour? And what is his speed?
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(7) At a certain speed a car covers a distance of 54 km in 2 hours. How much distance will it cover in 3 hour?
(8) By running at a speed of 2 km/h how much distance a car will cover in 5 second?
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