Answer:
30 mins
Step-by-step explanation:
speed = distance/ time
speed of car A
= 20/ 12 km/ min
= 5/ 3 km/ min
also, speed of car A = speed of car B
speed of car B = 5/ 3 km/ min = 50km / time taken (in mins)
[tex] \frac{5}{3} = \frac{50}{t} [/tex]
[tex]5t = 150[/tex]
[tex]t = 30[/tex]
=> t = 30 mins
