Question
If a bus travel 20 km in 15 minute then how much time
take if speed is decrease by 20 km/h?Solution
Distance covered in 15 minutes = 20 km. So the speed of the bus = (20/15) × 60 = 80 km/hr Reduced speed = (80 – 20) km/hr = 60 km/hr Time taken to cover 20 km = (60/60) × 20 = 20 min
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