Question

Two race cars, Car X and Car Y, are at the starting point of a 2km track race at the same time. Car X and Car Y make one lap 60s and 80s respectively.

Answer 1

Answer:

20 minutes

Step-by-step explanation:

Both will meet again at start point after

LCM(60,80) seconds.

That is 240 seconds.

in time slower car completes one lap, faster one covers 1 +20/80 lap, that is 1.25 laps.

After 20 laps faster by slower car car will be 5 laps ahead, time =20*60 = 1200s = 20 minutes

Answer 2

Answer:

20 minutes

Step-by-step explanation:

Both will meet again at start point after LCM(60,80) seconds.

That is 240 seconds.

in time slower car completes one lap, faster one covers 1 +20/80 lap, that is 1.25 laps. After 20 laps faster by slower car car will be 5 laps ahead, time =20x60

= 1200s

= 20 minutes

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