Buses 4

intervals:
1st bus 40 min.
2nd bus 2h
3rd bud 20min

How long take them to meet - as soon as possible?

Correct answer:

h =  4 h

Step-by-step explanation:

$$\begin{gathered} 40=2^3\cdot 5 \\ 120=2^3\cdot 3\cdot 5 \\ 80=2^4\cdot 5 \\ LCM(40,120,80)=2^4\cdot 3\cdot 5=240 \\ h=240\mathrm{/}60=4\text{ h} \end{gathered}$$

Try another example

Related math problems and questions:

• Buses
  At the bus stop is at 10 o'clock met buses No. 2 and No. 9. Bus number 2 runs at an interval of 4 minutes and the bus number 9 at intervals of 9 minutes. How many times the bus meet to 18:00 local time?
• 3 buses
  At morning 5:00 am three buses started from one place. The first travel in five-minute intervals, the second at 10-minute intervals and the third at 25-minute intervals. At what hour will again be the three buses coming from the same place?
• Bus lines
  At 5.00 in the morning, four buses left the terminal at the same time. The first bus has an interval of 15 minutes, the second 20 minutes, the third 25 minutes, and the fourth 45 minutes. How many minutes will all four buses leave the terminal at the same
• Two buses
  The first bus runs 15 minutes the second bus runs after 21 minutes. Together they both leave at 7:00 on Monday. When and what day will they meet?
• Three buses
  Three public transport buses depart together from the bus station in the morning. The first bus was returning to the station after 18 minutes, the second after 12 minutes and a third after 24 minutes. How long will again together on the station? Result ex
• Bus lines
  Buses connections are started from the bus stop on its regular circuit: No. 27 bus every 27 minutes and No.18 every half hour. What time started these two bus lines run if the bus stop met at 10:15 am.?
• Three
  Three buses follow the same circular route. The first driver is the slowest because he has many stops, and it takes him 90 minutes to cross the route. The second driver will pass the circuit in 1 hour. The third driver has the fewest stops, and the circui
• Steps
  Peter makes steps long 70 cm, John 45 cm long. After how many meters their footsteps meet?
• LCM of two number
  Find the smallest multiple of 63 and 147
• Drivers
  Driver Franta and driver Karel are friends. They leave the start-stop both at the same time in the afternoon - at 13.30. When will they meet again if Franta goes around his route in 50 minutes and Karel in 40 minutes?
• Buses
  Buses Ikarus and Karosa simultaneously started at 8:00 from the final station. Ikarus is returned to the station after 30 minutes. Karosa after 45 minutes. At what time both buses again returned to the station?
• Tram stop
  The blue tram stops every 12 minutes, the red one 8 minutes. At 8 o'clock they left the stop together. How many times do they meet at a stop before 11 am?
• Lcm simple
  Find least common multiple of this two numbers: 140 175.
• Trams
  Tram no. 3,7,10,11 rode together from the depot at 5am. Tram No. 3 returns after 2 hours, tram No. 7 an hour and half, no. 10 in 45 minutes and no. 11 in 30 minutes. For how many minutes and when these trams meet again?
• Blades
  1st blade 2,5 m, 2nd blade. .1.75 m. How many same long pieces of this two blades can be do the biggest? How long is one piece?
• Lcm of three numbers
  What is the Lcm of 120 15 and 5
• Trams
  Two trams started at the same time from the same place. One tram journey takes 30 minutes and the second 45 minutes to its final stop. How long will trams meet again?