A van moves at 45 km/h for 2 hours and then tracks at 55 km/h for the next 3 hours. Find the net average speed for the total route. MCQ with Answer and Explanation
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Question #1
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A person can row 10 km/h in still water. If the speed of the river current is 3 km/h, find the time taken to row 28 km upstream.
Correct Answer: Option C
Explanation:
Upstream speed = 10 - 3 = 7 km/h. Time taken = 28 / 7 = 4 hours.
Upstream speed = 10 - 3 = 7 km/h. Time taken = 28 / 7 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A boat moves upstream at 9 km/h and downstream at 15 km/h. Find the speed of the boat in still water.
Correct Answer: Option D
Explanation:
Speed in still water = (Downstream speed + Upstream speed) / 2 = (15 + 9) / 2 = 12 km/h.
Speed in still water = (Downstream speed + Upstream speed) / 2 = (15 + 9) / 2 = 12 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train 150 meters long completely passes a stone in 15 seconds. Find the speed of the train in km/h.
Correct Answer: Option A
Explanation:
Speed of train = 150 / 15 = 10 m/s. In km/h = 10 * (18/5) = 36 km/h.
Speed of train = 150 / 15 = 10 m/s. In km/h = 10 * (18/5) = 36 km/h.
This question belongs to:
Maths
Time Speed and Distance
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