Question

2. The distance between two towns is 300 km. Two cars start simultaneously fro
these towns and move towards each other. The speed of one car is more than t
other by 7 km/hr. If the distance between the cars after 2 hours is 34 km, find
speed of the cars.​

Answer 1

Answer: Let speed of car-A = x km/hr and speed of another car-B = (x+7) km/hr

 

after 2 hours, distance travelled by car-A = 2x km

after 2 hours, distance travelled by car-B = 2(x+7) = (2x+14)  km

 

distance between the two cars after  2 hour = 300 -2x -(2x+14) = 34 km  (1)

 

Eqn.(1) is written as ;  4x = 252    or   x = 63 km/hr

 

Hence speed of cars, 63 km/hr and 70 km/hr

Step-by-step explanation:

Answer 2

Answer:

So the speed of Car 1 = x = 63km/h

The speed of car 2 = x+7 = 63+7 =70km/h

Step-by-step explanation:

let the speed of the first car be x

then speed of other car is (x+7)

distance covered by fist car after 2 hour = 2x

distance covered by 2nd car = 2(x+7) = 2x+14

now , 2x+2x+14+34 = 300

4x+14+34 = 300

4x+48 = 300

4x = 300 - 48

x = 252 / 4 = 63 km/hr

distance of 2nd car = 63 + 7 = 70km/hr

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