Question : At a certain speed a car covers a distance of 28 km in 2 hours. How much distance will it cover in 3 hour?
Correct Answer 42 km
Solution & Explanation
Solution
Given,
Distance = 28 km
Time = 2 hour
Thus, distance covers in 3 hour = ?
Here the speed and time are given. So, we need to find the speed to calculate the distance covers in the given time.
Method (1) Using Formula
Calculation of Speed using formula
Formula to find the speed
Speed = Distance/Time
= 28/2 = 14 km/h
Thus, speed = 14 km/h
Calculation of the distance in the given time using formula
Formula to find the distance
Distance = Speed × Time
= 14 km/h × 3 hour = 42 km
Thus, the distance covered in the given time = 42 km Answer
Method (2) Using Unitary Method
Calculation of the Distance using formula
Given,
Distance = 28 km
Time = 2 hour
Thus, distance covers in 3 hour = ?
∵ In 2 hours the distance covered = 28 km
∴ In 1 hour the distance covered = 28/2 km
∴ In 3 hours the distance covered
= 28/2 × 3 km
= 28 × 3/2 km
= 84/2 = 42 km
Thus, the distance covered in the given time = 42 km Answer
Similar Questions
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(2) By running at a speed of 21 km/h how much distance a bus will cover in 9 second?
(3) By running at a speed of 41 km/h how much distance a cyclist will cover in 6 second?
(4) By running at a speed of 27 km/h how much distance a motor bike will cover in 8 second?
(5) By running at a speed of 11 km/h how much distance a scooty will cover in 7 second?
(7) 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 38 km/h how much distance a car will cover in 5 second?