Question
Buses A and B are moving around a circular ground of
radius 350 m. If the speeds of the buses A and B are 11 m/sec and 20 m/sec respectively, then what is the difference between the time taken by bus A and B to complete 2 round of the ground?Solution
Circumference if the ground = 2πr = 2 × 22/7 × 350 = 2200 m So, distance = 2200 m Time taken by bus A to cover 2 rounds of a ground = (2200/11) × 2 = 400 Time taken by bus B to cover 2 rounds of a ground = (2200/20) × 2 = 220 Required difference = 400 – 220 = 180
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