A car covers a distance of 450 km at a certain speed. If the speed is increased by 5 km/h, it takes 1 hour less to cover the same distance. Find the original speed of the car. MCQ with Answer and Explanation
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Question #1
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A transport truck covers a route track of 480 km in 8 hours. How much time will it require to clear a distance path of 360 km given it tracks at the same speed?
Correct Answer: Option A
Explanation:
Speed of truck = 480 / 8 = 60 km/h. Time taken for 360 km path = 360 / 60 = 6 hours.
Speed of truck = 480 / 8 = 60 km/h. Time taken for 360 km path = 360 / 60 = 6 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A cross-country runner covers the sides of an equilateral triangular course at speeds of 8 km/h, 12 km/h and 24 km/h respectively. Find his average speed for the whole round.
Correct Answer: Option C
Explanation:
Let each side of the triangular course be 24 km. Total perimeter = 3 * 24 = 72 km. Total time taken = 24/8 + 24/12 + 24/24 = 3 + 2 + 1 = 6 hours. Average speed = 72 / 6 = 12 km/h.
Let each side of the triangular course be 24 km. Total perimeter = 3 * 24 = 72 km. Total time taken = 24/8 + 24/12 + 24/24 = 3 + 2 + 1 = 6 hours. Average speed = 72 / 6 = 12 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A person rows 18 km downstream in 2 hours and covers the same distance upstream in 6 hours. What is the speed of the boat in still water?
Correct Answer: Option A
Explanation:
Downstream speed = 18 / 2 = 9 km/h. Upstream speed = 18 / 6 = 3 km/h. Speed in still water = (9 + 3) / 2 = 6 km/h.
Downstream speed = 18 / 2 = 9 km/h. Upstream speed = 18 / 6 = 3 km/h. Speed in still water = (9 + 3) / 2 = 6 km/h.
This question belongs to:
Maths
Time Speed and Distance
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