Question

two cars start together from city a nd b respectively and move towards each other . the average speed of car is 5 km/hr. more than the other and after traveling for 5 hrs the two cars are 85 km apart. if the distance between the two cities is 510 km, find their speeds​

Answer 1

Step-by-step explanation:

Let t hrs. be the time taken by the car B to reach the crossing point

Hence, A will take (t+1) hrs. to reach the same point

Speed of car B=50 km/hr

Distance covered before the crossing =50 × t

Now using the strategy (4), we know that the total distance covered by the two cars is the total distance between their starting points.

i.e. 40(t+1)+50t=400

⇒ 40t+50t+40=400

⇒ 90t=360

⇒ t=4 hrs

Hence, the distance covered by car B=50 × 4=200 km.