Question:
At a certain speed a car covers a distance of 78 km in 2 hours. How much distance will it cover in 3 hour?
Correct Answer
117 km
Solution And Explanation
Solution
Given,
Distance = 78 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
= 78/2 = 39 km/h
Thus, speed = 39 km/h
Calculation of the distance in the given time using formula
Formula to find the distance
Distance = Speed × Time
= 39 km/h × 3 hour = 117 km
Thus, the distance covered in the given time = 117 km Answer
Method (2) Using Unitary Method
Calculation of the Distance using formula
Given,
Distance = 78 km
Time = 2 hour
Thus, distance covers in 3 hour = ?
∵ In 2 hours the distance covered = 78 km
∴ In 1 hour the distance covered = 78/2 km
∴ In 3 hours the distance covered
= 78/2 × 3 km
= 78 × 3/2 km
= 234/2 = 117 km
Thus, the distance covered in the given time = 117 km Answer
Similar Questions
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(2) At a certain speed a car covers a distance of 52 km in 2 hours. How much distance will it cover in 3 hour?
(3) Find the distance covered by a bus in 24 hours if it covers a distance of 52 km in 14 hours.
(4) Find the distance covered by a bus in 24 hours if it covers a distance of 78 km in 14 hours.
(5) At a certain speed a scooty covers a distance of 86 km in 4 hours. How much distance will it cover in 5 hour?
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(7) Find the distance covered by a cyclist in 21 hours if it covers a distance of 60 km in 11 hours.
(8) By running at a speed of 3 km/h how much distance a motor bike will cover in 8 second?
(9) At a certain speed a car covers a distance of 54 km in 2 hours. How much distance will it cover in 3 hour?
(10) Find the distance covered by an athlete in 25 hours if it covers a distance of 88 km in 15 hours.