Aptitude:speed and distance [Section 1 of 1] Q1 of 30 Marks 1 General Instructions 100% ×CloseTest time left: 23:15Select the correct answerA car travelling at an average speed of 72 km/hr takes 9 minutes to travel a certain distance. By how much should it increase its speed (in km/hr) to travel the same distance in 8 minutes?
Question
Aptitude:speed and distance [Section 1 of 1] Q1 of 30 Marks 1 General Instructions 100% ×CloseTest time left: 23:15Select the correct answerA car travelling at an average speed of 72 km/hr takes 9 minutes to travel a certain distance. By how much should it increase its speed (in km/hr) to travel the same distance in 8 minutes?
Solution
To solve this problem, we first need to find out the distance the car travels.
Step 1: Convert the time from minutes to hours. 9 minutes = 9/60 = 0.15 hours
Step 2: Use the formula distance = speed * time to find the distance. Distance = 72 km/hr * 0.15 hr = 10.8 km
Now, we need to find out the speed needed to travel this distance in 8 minutes.
Step 3: Convert the time from minutes to hours. 8 minutes = 8/60 = 0.1333 hours
Step 4: Use the formula speed = distance/time to find the new speed. Speed = 10.8 km / 0.1333 hr = 81 km/hr
So, the car needs to increase its speed by 81 km/hr - 72 km/hr = 9 km/hr to travel the same distance in 8 minutes.
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