Question:
By running at a speed of 21 km/h how much distance a scooty will cover in 7 second?
Correct Answer
40.81 meter
Solution And Explanation
Solution
Given,
Speed = 21 km/h
Time = 7 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, 21 km/h = 21 × 5/18 m/s
= 21 × 5/18 m/s
= 105/18 = 5.83 m/s
Thus, speed = 5.83 m/s
Calculation of distance using formula
Formula to calculate distance when speed and time are given
Distance = Speed × Time
⇒ Distance = 5.83 m/s × 7 s = 40.81 m
Thus, distance = 40.81 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 5.83 meter
∴ In 7 second, the distance covered = 5.83 m × 7 = meter
Thus, distance = 40.81 meter Answer
Similar Questions
(1) At a certain speed a scooty covers a distance of 86 km in 4 hours. How much distance will it cover in 5 hour?
(2) Find the distance covered by a moving object in 28 hours if it covers a distance of 100 km in 18 hours.
(3) Find the distance covered by a scooty in 22 hours if it covers a distance of 50 km in 12 hours.
(4) Mr. Robert goes to his office everday by a cycle and returns home everyday by an electric cycle. If the speed of the cycle is 15 km/h and the speed of the electric bike is 25 km/h, then find his average speed in to and fro journey.
(5) By running at a speed of 29 km/h how much distance a motor bike will cover in 8 second?
(6) At a certain speed a cyclist covers a distance of 40 km in 3 hours. How much distance will it cover in 4 hour?
(7) Find the distance covered by a motor bike in 23 hours if it covers a distance of 72 km in 13 hours.
(8) Find the distance covered by a bus in 24 hours if it covers a distance of 84 km in 14 hours.
(9) At a certain speed a cyclist covers a distance of 64 km in 3 hours. How much distance will it cover in 4 hour?
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