Question:
By running at a speed of 45 km/h how much distance a scooty will cover in 7 second?
Correct Answer
87.5 meter
Solution And Explanation
Solution
Given,
Speed = 45 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, 45 km/h = 45 × 5/18 m/s
= 45 × 5/18 m/s
= 225/18 = 12.5 m/s
Thus, speed = 12.5 m/s
Calculation of distance using formula
Formula to calculate distance when speed and time are given
Distance = Speed × Time
⇒ Distance = 12.5 m/s × 7 s = 87.5 m
Thus, distance = 87.5 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 12.5 meter
∴ In 7 second, the distance covered = 12.5 m × 7 = meter
Thus, distance = 87.5 meter Answer
Similar Questions
(1) Find the distance covered by a bus in 24 hours if it covers a distance of 66 km in 14 hours.
(2) At a certain speed a car covers a distance of 8 km in 2 hours. How much distance will it cover in 3 hour?
(3) By running at a speed of 46 km/h how much distance a bus will cover in 9 second?
(4) At a certain speed a scooty covers a distance of 94 km in 4 hours. How much distance will it cover in 5 hour?
(5) An athlete takes 30 second to complete a race of 450 meter. Find the speed of the athlete in kilometre per hour.
(6) By running at a speed of 39 km/h how much distance a scooty will cover in 7 second?
(7) By running at a speed of 30 km/h how much distance an athlete will cover in 10 second?
(8) At a certain speed a cyclist covers a distance of 42 km in 3 hours. How much distance will it cover in 4 hour?
(9) Find the distance covered by a cricket ball in 27 hours if it covers a distance of 78 km in 17 hours.
(10) By running at a speed of 8 km/h how much distance an athlete will cover in 10 second?