1.

Points a and b are 100 km apart from highway if car travels in same directions with constant speed they meet in 5hours If they travel towards each other they meet in one hour . What are the speed of two cars?

Answer»

Answer:

speed of car A and B are 60 km/hr and 40 km/hr

Step-by-step EXPLANATION:

let the speed of two CARS is x km/hr and y km/hr

distance of car A travel in same direction = speed × TIME

= x × 5 = 5x

distance of car B travel in same

direction = 5y

5x - 5y = 100 (divide by 5)

x - y = 20 ----------(1)

distance of car A travel towards each other = x × 1 = x

distance of car B = y

x + y = 100 ---------(2)

on adding eq. 1 and 2

x - y = 20

x + y = 100

..............................

2X = 120

x = 120/2

x = 60

put x in eq. 2

x + y = 100

60 + y = 100

y = 100 - 40

y = 60


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