Question 994005: Please help me i'm weak in speed/distance chapter
Ques1.
Two drivers, Mike and Peter, travel from Town A to Town B, 112 km away.
They start at the same time and take the same route.
They travel at the average speed of 56 km/h and 64 km/h respectively.
When Peter reaches Town B, how far behind is Mike?
Quest2.
The distance between two town X and Y is 28 km. A car and a lorry leave X at 08.00 to travel to Y. On arriving at Y, the car then returns to X on the same route. When the two vehicles meet, the distance they have travelled are in the ratio 3:5. The average speed of the lorry is 42 km/h.
Calculate
(a) the time at which the two vehicles meet.
(b) the average speed of the car in km/h
Answer by Gogonati(855)   (Show Source):
You can put this solution on YOUR website! The time that Peter needs to travel from A to B is 112 km/64 km/h=7/4 h.
The time that Mike needs to travel from A to B is 112 km/56 km/h=2h
Peter reaches at B 2-7/4=1/4 h before Mike.
Since Mike travel at the average speed of 56 km/h he will be behind Peter 56km/h*1/4 h= 14 km.
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