Question
two busses both leave from the same station the blue line leaves every 15 minutes and the red line leaves every 20 minutes if both busses leave the station at 9:15 AM what time will it be when both busses leave at the same time again
Answers
Ms. Sue
The least common multiple of 15 and 20 is 60. Take it from there.
Arenea
They will both leave at 10:00
Anonymous
Need help right now
Jordan
60 is the least common multiple of 15 and 20 so 9:15 plus an hour is = to 10:15.
Helper
Here is your answer
Take out the LCM
SO first DO THE PRIME FACTORISATION OF 10,15 and 24
10=2×5
15= 3×5
24=2×2×2×3
LCM= 2×2×2×3×5
=120min
Trian will depart on all three lines at the same time after every 120 minutes or 2hours
Take out the LCM
SO first DO THE PRIME FACTORISATION OF 10,15 and 24
10=2×5
15= 3×5
24=2×2×2×3
LCM= 2×2×2×3×5
=120min
Trian will depart on all three lines at the same time after every 120 minutes or 2hours