Question

On a track for remote controlled racing cars, racing car A completes the track in 36 seconds, while racing carB completes in 24 seconded If they both start at the same time after how many seconded will they be side by side againConvert the answer to show how many minute and seconded it would take for them to be side by side again

Answer 1

Okay, here we have this:

Here we need to identify how many seconds will it take for the two cars to meet again, therefore for this we are going to find the least common multiple of the two numbers (36, 24):

To do this, we will first decompose each number, and then we will multiply each factor the greatest number of times that it occurs in any of the numbers:

36=2*2*3*3

24=2*2*2*3

LCM(36, 24)=2*2*2*3*3

LCM(36, 24)=72 seconds.

Finally we obtain that the two cars will take 72 seconds to meet again, this is equivalent to 1 minute and 12 seconds.