Problema Solution
How many minutes will it take a helicopter, flying at 120km/hr, to reach a naval vessel that is 45km away, if the vessel is heading toward the helicopter at 30km/hr?
Answer provided by our tutors
let
h = 120 km/h the speed of the helicopter
d = 45 km the distance
v = 30 km/h the speed of the vessel
t = the time of the travel in hours
h*t + v*t = 45
120t + 30t = 45
by solving we find
t = 0.3 hr
t = 0.3*60 min
t= 18 min
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it will take 18 minutes for the helicopter to reach the naval vessel.