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Distance Delhi to Agra = 200 km
Speed for 100 km = 50 km/h
=> time duration taken to cover it = 100/50 = 2 hours
Average speed for whole 200 km/h = 70 km/h (given)
=> Total duration taken to cover 200 km = 200/70 = 20/7 hours
Time duration to cover the last 100 km = 20/7 - 2 = 6/7 hours
Average speed during the last 100 km = 100/(6/7) = 700/6 km/h
========
15 km covered at speed 30 kmph : duration taken = 15/30 = 1/2 hr
75 km covered at speed 50 kmph : duration taken = 75/50 = 3/2 hr
10 km covered at speed 20 kmph : duration taken = 10/20 = 1/2 hr
Total duration = 5/2 hrs
Total distance = 100 km
average speed = 100/(5/2) = 40 kmph
Speed for 100 km = 50 km/h
=> time duration taken to cover it = 100/50 = 2 hours
Average speed for whole 200 km/h = 70 km/h (given)
=> Total duration taken to cover 200 km = 200/70 = 20/7 hours
Time duration to cover the last 100 km = 20/7 - 2 = 6/7 hours
Average speed during the last 100 km = 100/(6/7) = 700/6 km/h
========
15 km covered at speed 30 kmph : duration taken = 15/30 = 1/2 hr
75 km covered at speed 50 kmph : duration taken = 75/50 = 3/2 hr
10 km covered at speed 20 kmph : duration taken = 10/20 = 1/2 hr
Total duration = 5/2 hrs
Total distance = 100 km
average speed = 100/(5/2) = 40 kmph
kvnmurty:
:-)
(^_^)
Very nice sir
Thanku sir
good answer
Answered by
1
Answer:
Total duration 5/2 hours
Total distance 100 km
Average speed is =100 / (5/2)= 40kmph
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