Question:
By running at a speed of 7 km/h how much distance an athlete will cover in 10 second?
Correct Answer
19.4 meter
Solution And Explanation
Solution
Given,
Speed = 7 km/h
Time = 10 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, 7 km/h = 7 × 5/18 m/s
= 7 × 5/18 m/s
= 35/18 = 1.94 m/s
Thus, speed = 1.94 m/s
Calculation of distance using formula
Formula to calculate distance when speed and time are given
Distance = Speed × Time
⇒ Distance = 1.94 m/s × 10 s = 19.4 m
Thus, distance = 19.4 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 1.94 meter
∴ In 10 second, the distance covered = 1.94 m × 10 = meter
Thus, distance = 19.4 meter Answer
Similar Questions
(1) 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.
(2) Find the distance covered by a scooty in 22 hours if it covers a distance of 84 km in 12 hours.
(3) Find the distance covered by a ball in 26 hours if it covers a distance of 88 km in 16 hours.
(4) Find the distance covered by a moving object in 28 hours if it covers a distance of 96 km in 18 hours.
(5) Find the distance covered by a car in 20 hours if it covers a distance of 54 km in 10 hours.
(6) By running at a speed of 23 km/h how much distance a motor bike will cover in 8 second?
(7) By running at a speed of 13 km/h how much distance a motor bike will cover in 8 second?
(8) Find the distance covered by a scooty in 22 hours if it covers a distance of 56 km in 12 hours.
(9) Find the distance covered by a motor bike in 23 hours if it covers a distance of 68 km in 13 hours.
(10) At a certain speed a cyclist covers a distance of 54 km in 3 hours. How much distance will it cover in 4 hour?