Question:
By running at a speed of 21 km/h how much distance a cyclist will cover in 6 second?
Correct Answer
34.98 meter
Solution And Explanation
Solution
Given,
Speed = 21 km/h
Time = 6 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 × 6 s = 34.98 m
Thus, distance = 34.98 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 5.83 meter
∴ In 6 second, the distance covered = 5.83 m × 6 = meter
Thus, distance = 34.98 meter Answer
Similar Questions
(1) By running at a speed of 25 km/h how much distance a scooty will cover in 7 second?
(2) At a certain speed a cyclist covers a distance of 12 km in 3 hours. How much distance will it cover in 4 hour?
(3) At a certain speed a car covers a distance of 24 km in 2 hours. How much distance will it cover in 3 hour?
(4) Find the distance covered by a cyclist in 21 hours if it covers a distance of 50 km in 11 hours.
(5) Find the distance covered by a cyclist in 21 hours if it covers a distance of 90 km in 11 hours.
(6) Find the distance covered by a moving object in 28 hours if it covers a distance of 66 km in 18 hours.
(7) By running at a speed of 31 km/h how much distance a motor bike will cover in 8 second?
(8) By running at a speed of 42 km/h how much distance a car will cover in 5 second?
(9) At a certain speed a scooty covers a distance of 52 km in 4 hours. How much distance will it cover in 5 hour?
(10) A car covers a distance of 350 km in 10 hours. Find the speed and distance covered in 8 hours by the given car.