Problema Solution
Two planes start at the same time from points that are 1550 kilometers apart. How long will it take the two planes to meet if plane A flies at 220 kilometers an hour and plane B flies at 280 kilometers an hour?
Answer provided by our tutors
let
v1 = 220 km/h the speed of plane A
v2 = 280 km/h the speed of plane B
d = 1550 km the distance between A and B
t = the time needed for the planes to meet
since speed = distance/time we have distance = speed*time
the distance of plane A + the distance of plane B = the total distance
v1*t + v2*t = d
220t + 280t = 1550
by solving we find:
t = 3.1 hr
t = 3 hr o.1*60 min
t = 3 hr 6 min
click here to see the step by step solution of the equation:
the planes will meet in 3 hours and 6 minutes.