A mechanic wheel tracks 3000 revolutions to bridge a course distance of 2640 meters. Find the radius size of the wheel. MCQ with Answer and Explanation
Explanation:
Total distance = 360 + 240 = 600 km. Time for first part = 360 / 45 = 8 hours. Time for second part = 240 / 60 = 4 hours. Total time = 8 + 4 = 12 hours. Average speed = 600 / 12 = 50 km/h.
Two commuter trains 130 meters and 120 meters long are tracking in opposite directions at speeds of 42 km/h and 48 km/h respectively. In what time will they clear each other?
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