Question

Places A and B are 80 km apart from each other on a highway . A car starts from A and another from B at same time . If they move in the same direction they meet in 8 hours and if they moved towards each other they meet in 1 hour 20 minutes. Find the speed of cars.

Answer 1

230km/h so this answer is right?

Answer 2

Answer: distance between the cars is 80Km.

Step-by-step explanation: let the speed of car A be x and B be y.

If they travel in the same direction then:

80/(x-y)= 8

80/8 = x - y

x - y = 10----- (1)

If they travel towards each other then:

80/(x+y)= 4/3 ---(1. 20/60hrs = 1.1/3hrs=4/3hrs)

x+y = 80×3/4

x+y = 60 ------(2)

From (2) and (1)

x+y = 60

x- y = 10

--------------

2x = 70

x= 35

Substituting value of x in (1)

Therefore, 35 - y = 10

35- 10 = y

y = 25

Therefore, speed of car A is 35Km, and car B is 25Km.