A bicycle wheel of diameter 140 cm makes 300 revolutions in one minute. Find the speed of the bicycle in km/h. MCQ with Answer and Explanation
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Question #1
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A man rows upstream 14 km and downstream 26 km, taking 4 hours each time. Find the speed of the current.
Correct Answer: Option D
Explanation:
Upstream speed = 14 / 4 = 3.5 km/h. Downstream speed = 26 / 4 = 6.5 km/h. Speed of current = (Downstream speed - Upstream speed) / 2 = (6.5 - 3.5) / 2 = 3 / 2 = 1.5 km/h.
Upstream speed = 14 / 4 = 3.5 km/h. Downstream speed = 26 / 4 = 6.5 km/h. Speed of current = (Downstream speed - Upstream speed) / 2 = (6.5 - 3.5) / 2 = 3 / 2 = 1.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Walking at 3/5 of his typical pace, a technician reaches his field assignment 16 minutes late. Find his typical baseline time.
Correct Answer: Option C
Explanation:
New speed = 3/5 of normal speed => New time = 5/3 of normal time. Difference = 2/3 of normal time = 16 minutes. Normal baseline time = (16 * 3) / 2 = 24 minutes.
New speed = 3/5 of normal speed => New time = 5/3 of normal time. Difference = 2/3 of normal time = 16 minutes. Normal baseline time = (16 * 3) / 2 = 24 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 D
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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