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 & 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 36 km/h how much distance a cyclist will cover in 6 second?
(3) By running at a speed of 36 km/h how much distance a motor bike will cover in 8 second?
(4) By running at a speed of 4 km/h how much distance a motor bike will cover in 8 second?
(8) By running at a speed of 49 km/h how much distance a cyclist will cover in 6 second?
(9) By running at a speed of 24 km/h how much distance a car will cover in 5 second?