Question

Alyssa and her brother luke are racing. Cars around as track . It takes a Alyssa car 15 seconds to go one complete run around the track. It takes lucks car 13. Seconds to go around the track one time . How many seconds will it take for both cars to return to the starting point at the same time .

Answer 1

195 s

Explanation:

Question is asking for LCM

Alyssa=15secs

Luke=13secs

let t be time to return to same spot

Find prime factorization of each time.

15=3*5

13=13

LCM=3*5*13=195

t=195 secs