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) By running at a speed of 32 km/h how much distance an athlete will cover in 10 second?
(3) By running at a speed of 44 km/h how much distance a motor bike will cover in 8 second?
(4) At a certain speed a scooty covers a distance of 26 km in 4 hours. How much distance will it cover in 5 hour?
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(6) Find the distance covered by a cricket ball in 27 hours if it covers a distance of 96 km in 17 hours.
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