A delivery coach covers a highway stretch at 40 km/h. If the driver spikes the speed index to 60 km/h, the coach lands at the station terminal 15 minutes early. Find the track sector distance. MCQ with Answer and Explanation
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Question #1
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A boat moves upstream at a speed of 11 km/h and downstream at 16 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 = (16 + 11) / 2 = 27 / 2 = 13.5 km/h.
Speed in still water = (Downstream speed + Upstream speed) / 2 = (16 + 11) / 2 = 27 / 2 = 13.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A wheel makes 2000 revolutions to cover a distance of 1760 meters. Find the radius of the wheel.
Correct Answer: Option B
Explanation:
Distance covered in 1 revolution = 1760 / 2000 = 0.88 meters = 88 cm. Circumference = 2 * (22/7) * r = 88 cm => (44/7) * r = 88 => r = 14 cm.
Distance covered in 1 revolution = 1760 / 2000 = 0.88 meters = 88 cm. Circumference = 2 * (22/7) * r = 88 cm => (44/7) * r = 88 => r = 14 cm.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A high-speed train clears a structural platform watchpost signal pillar in 6 seconds and passes across the full platform itself, which measures 200 meters long, in 16 seconds. Find the speed index of the train in km/h.
Correct Answer: Option D
Explanation:
Time taken to cross the platform span alone = 16 - 6 = 10 seconds. Speed of train = 200 / 10 = 20 m/s. In km/h index = 20 * (18/5) = 72 km/h.
Time taken to cross the platform span alone = 16 - 6 = 10 seconds. Speed of train = 200 / 10 = 20 m/s. In km/h index = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
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