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 First Half do u means 100 km???

Answers

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
your answer wrong
2016-03-08T12:56:25+05:30

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T is 3hr 40 min
avg. speed 66.6kmph
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