Question

two cars start from the same point with speed 39 kilometre per hour and 51 kilometre per hour find the distance between them after 15 minutes if the travel in the
a)same direction
b)the opposite direction.....​

Answer 1

Step-by-step explanation:

Speed of Second car is ⟹

100

125

×40=50

Let velocity of Third car be x

Let t be Time taken to overtake first car

Distance covered is xt=40t+20

⟹x=

t

40t+20

Distance covered to overtake second car is x(t+1.5)=50(t+1.5)+25

⟹

t

40t+20

(t+1.5)=50t+100

⟹t

2

+2t−3=0

⟹t=1,−3

Time cannot be negative So t=1⟹x=60