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