An ordinary plane leaves an airport and flies due west at 180 kph. 2 hours later a jet leaves the same airport and flies due west at 900 kph. how far from the airport will the jet plane take over the ordinary plane

1
by lorna1

• Brainly User
2015-09-03T00:34:32+08:00

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Distance = (Rate) (Time)
Rate           Time        Distance
Plane 1 (Ordinary plane)                  180                 x                 (180) (x)
Plane 2 (Jet)                                        900                x-2               900 (x-2)

Looking for distance (How far?)

Equation:
Distance traveled by ordinary plane = Distance traveled by jet
180 x = 900 (x-)
180 x = 900x - 1800
900x - 180x = 1800
720x = 1800

720x = 1800
720 = 1800

x = 2.5

Distance from the airport the jet overtakes the ordinary plane:
Distance = 900 km  (x-2 hr)
hr.
= 900 km  (2.5-2 hr)
hr

= 900 km  (0.5 hr)
hr
= 450 kms