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Points A and B are 70 …

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Points A and B are 70 km apart on highway. A car starts from point A another car starts from point B simultaneously .If they travel in the same direction they meet in 7 hours, but if they travel towards each other, they meet in one hour. Find the speed of two cars.

Posted by Charanjeet Singh 7 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Ammu Ammu 7 years, 6 months ago

Let the speed of car A = x km/h Let the speed of car :-) :-) :-) :-) :-) :-) :-) In the same direction ..... Speed = (x-y) km/h (condition given in book) In opposite direction ........ Speed= (x+y) km/h (............) Speed=d/t According to 1condition... x-y=70/7 So, x-y=10 ........eq(1) According to 2 condition... x+y=70.........eq(2) By elimination x-y=10 x+y=70 ----------- 2x=80 x=40km/h So y=30km/h. Hope you understand :-) :-) :-) :-)

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CBSE > Class 10 > Mathematics