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 & 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) By running at a speed of 16 km/h how much distance a car will cover in 5 second?
(3) By running at a speed of 40 km/h how much distance a cyclist will cover in 6 second?
(4) By running at a speed of 19 km/h how much distance a motor bike will cover in 8 second?
(5) By running at a speed of 32 km/h how much distance a motor bike will cover in 8 second?
(6) Find the distance covered by a cyclist in 21 hours if it covers a distance of 72 km in 11 hours.
(7) Find the distance covered by a scooty in 22 hours if it covers a distance of 82 km in 12 hours.
(8) Find the distance covered by a commet in 27 hours if it covers a distance of 100 km in 17 hours.
(10) By running at a speed of 20 km/h how much distance a car will cover in 5 second?