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# ICSE Class 9 Answered

HOW TO SOLVE THIS
Asked by adv.mukulsrivastava | 15 May, 2019, 10:08: AM
Expert Answer
We know,

Average speed = Total distance/ total time taken
Total time required to complete the 200 km journey is
t = 200/ 60 = 20/6 hour

The first 50 km distance is completed with a speed of 40 km/h
Thus, time taken to complete 50 km distance is,
t = 50/40 = 5/4 hour

Thus the remaining journey of 150 km must be completed in

Thus, to maintain the average speed of 60 km/h for whole journey the distance of 150 km must be completed with
speed of,

Answered by Shiwani Sawant | 15 May, 2019, 11:24: AM

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