A boatman logs 24 km downstream in 3 hours and the exact same route upstream in 6 hours. What is the speed of the boat in still water? MCQ with Answer and Explanation
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Question #1
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A car travels a distance of 300 km at a certain speed. If the speed is increased by 10 km/h, it takes 5 hours for the journey. Find the original speed.
Correct Answer: Option A
Explanation:
New speed = 300 / 5 = 60 km/h. Since new speed is original speed + 10 km/h, the original speed = 60 - 10 = 50 km/h.
New speed = 300 / 5 = 60 km/h. Since new speed is original speed + 10 km/h, the original speed = 60 - 10 = 50 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Walking at 7/9 of his baseline typical speed, a courier agent reaches his office terminal 12 minutes late. Find his typical baseline time parameter.
Correct Answer: Option B
Explanation:
New speed = 7/9 of usual speed => New time = 9/7 of usual time. Difference = 2/7 of usual time = 12 minutes. 1/7 of usual time = 6 minutes => Usual time = 42 minutes.
New speed = 7/9 of usual speed => New time = 9/7 of usual time. Difference = 2/7 of usual time = 12 minutes. 1/7 of usual time = 6 minutes => Usual time = 42 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A car covers a certain distance at an average speed of 40 km/h in 6 hours. At what speed must it travel to cover the same distance in 4 hours?
Correct Answer: Option A
Explanation:
Distance = 40 * 6 = 240 km. New required speed = 240 / 4 = 60 km/h.
Distance = 40 * 6 = 240 km. New required speed = 240 / 4 = 60 km/h.
This question belongs to:
Maths
Time Speed and Distance
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