Question : By running at a speed of 28 km/h how much distance a bus will cover in 9 second?
Correct Answer 70.02 meter
Solution & Explanation
Solution
Given,
Speed = 28 km/h
Time = 9 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, 28 km/h = 28 × 5/18 m/s
= 28 × 5/18 m/s
= 140/18 = 7.78 m/s
Thus, speed = 7.78 m/s
Calculation of distance using formula
Formula to calculate distance when speed and time are given
Distance = Speed × Time
⇒ Distance = 7.78 m/s × 9 s = 70.02 m
Thus, distance = 70.02 meter Answer
Calculation of distance using Unitary Method
∵ In 1 second the distance covered = 7.78 meter
∴ In 9 second, the distance covered = 7.78 m × 9 = meter
Thus, distance = 70.02 meter Answer
Similar Questions
(1) Find the distance covered by a car in 20 hours if it covers a distance of 68 km in 10 hours.
(2) By running at a speed of 23 km/h how much distance a bus will cover in 9 second?
(3) Find the distance covered by an athlete in 25 hours if it covers a distance of 86 km in 15 hours.
(4) By running at a speed of 42 km/h how much distance a scooty will cover in 7 second?
(5) Find the distance covered by a car in 20 hours if it covers a distance of 90 km in 10 hours.
(6) By running at a speed of 31 km/h how much distance a scooty will cover in 7 second?
(7) By running at a speed of 26 km/h how much distance a cyclist will cover in 6 second?
(8) Find the distance covered by a cyclist in 21 hours if it covers a distance of 70 km in 11 hours.
(10) By running at a speed of 35 km/h how much distance a scooty will cover in 7 second?