Question

Mark's model train can go 1/3 laps around its track in 2 minutes (120 seconds). If it runs at the same speed, how many seconds will it take the train to complete 1 lap?

a) 240 seconds
b) 360 seconds
c) 480 seconds
d) 720 seconds

Answer 1

The train will take 360 seconds to complete 1 lap.

Step-by-step explanation:

To find how many seconds it will take the train to complete 1 lap, we need to find the time for 1 whole lap, instead of 1/3 of a lap. Since the train completes 1/3 lap in 120 seconds, we can set up a proportion to find the time for 1 lap:

1/3 lap / 120 seconds = 1 lap / x seconds

Cross multiplying, we get 1/3(x) = 120(1)

Simplifying further, we get x = 360 seconds.

Therefore, it will take the train 360 seconds to complete 1 lap.