A car starts from station A at 8 a.m. and
travels towards station B which is 275
km apart. If the speed of the car is 50
km/hr, when will it reach station B?
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A car starts from station A at 8 a.m. and
travels towards station B which is 275
km apart. If the speed of the car is 50
km/hr, when will it reach station B?
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Step-by-step explanation:
Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 am and travel towards B at 20 km/hr speed. Another train starts from B at 8 am and travel towards A at 25 km/hr speed. At what time will they meet?
Given that
The velocity of car 1 is 20km/h20km/h
The velocity of car 2 is 25 km/hkm/h
The distance between the two stations is 110km110km
Suppose the two car meet ‘tt’ hour after 7 a.m.
If x1x1be the distance covered by the train in tt hour then
x1=velocity×time=20×t=20tx1=velocity×time=20×t=20t
Since train 2 starts 1 hour later, therefore the distance x2x2 has to be covered in time (t−1)(t−1) hour will be
x2=25×(t−1)=25(t−1)x2=25×(t−1)=25(t−1)
Since x1+x2=110x1+x2=110
20t+25(t−1)=110(∵distance=speed×tim