A train covers the first 160 kilometre of a journey at 40 km per hour, the next 180 km at 45 km per hour and the last 200 km at 50 km per hour . Find ( ¡ ) the total time it takes to complete the journey and ( ¡¡ ) the average speed of train during the whole journey.
Answers
Answered by
11
Answer:
(i) 12 hours
(ii) 45kms/hr
Step-by-step explanation:
speed= distance/time
(i) first 160 kms at 40 kms/hour time taken is 160/40 = 4 hours
similarly, time taken for 180 kms = 180/45= 4 hours
and for 200 kms = 200/50 = 4 hours
so, total time taken in journey is 4+4+4 = 12 hours
(ii) average speed is , total distance / total time taken
which is 160+180+200 / 4+4+4 = 540/ 12 = 45 kms/ hour
so, the avg. speed was 45kms/hour.
Answered by
3
Answer:
your answer is 45km/hr
Step-by-step explanation:
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