Question

Q10. The local bus service has 2 lines of
buses that start together at 8 a.m. Buses
on line A leave after every 15 minutes while
Buses on line B leave after every 20
minutes. In a day, how many times do
buses on both line A and B leave together
between 8 a.m. and 11 a.m.
​

Answer 1

• Answer:

10 A . M

• Step-by-step explanation:

In order to find our solution, we have to find the LCM of 15 and 20. So the buses leave together after 1 hour. 8 a.m. + 1 hour = 9 a.m. 9 a.m. + 1 hour = 10 a.m.