Question

Someone please.

Two companies have just started a round­the­clock air taxi service between Rome and Milan. They use the same flight path and fly at constant speeds at different altitudes. Planes owned by the company Alpha­Air take off from Rome every 10 minutes and take 90 minutes to reach Milan. Planes owned by the company Beta­Air take off every 5 minutes and take 60 minutes to reach Milan. Captain Johnston, who flies for Beta­Air, takes off from Rome 5 minutes after the previous Alpha­Air flight has departed.
How many Alpha­Air planes (flying from Rome to Milan) will Captain Johnston have passed as he lands in Milan?
A0 B3 C2 D1 E4

Answer 1

Answer:

Down voteAccepted

I agree with you that 33 looks correct

Let's suppose that Captain Johnston takes off at 10:05 and lands at 11:05

Meanwhile the Alpha-Air timetable includes

takeoff landing 09:30 11:00 09:40 11:10 09:50 11:20 10:00 11:30 10:10 11:40

So Captain Johnston passes the middle three of these in that he takes off later and lands earlier

pls mark as I