Time and Distance
Math MCQs

Question :    By running at a speed of 20 km/h how much distance an athlete will cover in 10 second?

Correct Answer  55.6 meter

Solution & Explanation

Solution

Given,

Speed = 20 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, 20 km/h = 20 × ⁵/₁₈ m/s

= ^{20 × 5}/₁₈ m/s

= ¹⁰⁰/₁₈ = 5.56 m/s

Thus, speed = 5.56 m/s

Calculation of distance using formula

Formula to calculate distance when speed and time are given

Distance = Speed × Time

⇒ Distance = 5.56 m/s × 10 s = 55.6 m

Thus, distance = 55.6 meter Answer

Calculation of distance using Unitary Method

∵ In 1 second the distance covered = 5.56 meter

∴ In 10 second, the distance covered = 5.56 m × 10 = meter

Thus, distance = 55.6 meter Answer

Similar Questions

(1) Find the distance covered by a moving object in 28 hours if it covers a distance of 92 km in 18 hours.

(2) At a certain speed a car covers a distance of 72 km in 2 hours. How much distance will it cover in 3 hour?

(3) Find the distance covered by a scooty in 22 hours if it covers a distance of 96 km in 12 hours.

(4) By running at a speed of 30 km/h how much distance a car will cover in 5 second?

(5) At a certain speed a cyclist covers a distance of 22 km in 3 hours. How much distance will it cover in 4 hour?

(6) By traveling a speed of 18 km/h, a bike completes a journey in 25 minute, then find the distance covered by him and how much time it will take cover a distance of 120 km?

(7) Find the distance covered by a motor bike in 23 hours if it covers a distance of 100 km in 13 hours.

(8) By running at a speed of 8 km/h how much distance a bus will cover in 9 second?

(9) By running at a speed of 30 km/h how much distance an athlete will cover in 10 second?

(10) By running at a speed of 10 km/h how much distance a car will cover in 5 second?