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Two planes fly along the same flight path in opposite directions Plane A flies from island A to island B whilst plane B flies from island B to A Plane B flies at 240km/hr Both planes pass each other after plane A has been flying for 30mins 10 mins later plane B still has 20km left to reach island A whilst plane A lands at island B What is the distance between the two islands?

 Jul 29, 2020
 #1
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80km

 Jul 29, 2020
 #2
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If plane A flew 30 minutes, plane B also flew 30 minutes.

30min = 0.5h

240km/h * 0.5h = 120km

10min = 1/6h

240km/h * 1/6h = 40km

120km + 40km + 20km = 180km

laugh

 Jul 29, 2020
 #3
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Plane B flies   30 min + 10 min     + 20 km    @ 240 km/60 min

40 min * 240 km/60min + 20 km = 180 km           .....as guest found !  cheeky

 Jul 29, 2020

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