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) Find the distance covered by a cyclist in 21 hours if it covers a distance of 72 km in 11 hours.
(2) Find the distance covered by a cyclist in 21 hours if it covers a distance of 58 km in 11 hours.
(3) Find the distance covered by a moving object in 28 hours if it covers a distance of 76 km in 18 hours.
(4) Find the distance covered by a scooty in 22 hours if it covers a distance of 54 km in 12 hours.
(5) Find the distance covered by an athlete in 25 hours if it covers a distance of 98 km in 15 hours.
(6) By running at a speed of 12 km/h how much distance a bus will cover in 9 second?
(7) At a certain speed a scooty covers a distance of 8 km in 4 hours. How much distance will it cover in 5 hour?
(8) By running at a speed of 15 km/h how much distance a car will cover in 5 second?
(9) Find the distance covered by an athlete in 25 hours if it covers a distance of 96 km in 15 hours.
(10) An athlete takes 1 minute 20 second to complete a race of 1000 meter. Find the speed of the athlete in kilometre per hour.