# Out of Total distance covered of 200 kilometre first half is covered at the speed of 60 kilometre per hour and the remaining half is covered at 75 kilometre per hour find 1) the total time taken to cover the whole journey 2) the average speed for the whole journey

2
by RUTVI1
By First Half do u means 100 km???

2016-03-08T11:24:08+05:30

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1)Time for First half
time=distance/speed
t₁= 100/60
t₁= 1.67 hours
Time For Second half
time=distance/speed
t
₂ = 100/75
t₂ = 1.33 hours
Total Time = t₁+t₂
= 1.67 +1.33
= 3 Hours
2)Average Speed For Whole Journey
= Total Distance/ Total Time
= 200/3
=66.67 km/h
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ans is wrong bro... if 1.30 +1.30 is equal to 3 hr... then how u answer is come 3hr... covert hour to min after add the min you got answer