# maths

A freight train leaves a station traveling at 32 km/h. Two hours later, a passenger train leaves
the same station traveling in the same direction at 52 km/h. How long does it takes the passenger
train to catch up to the freight train?

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1. 32 (t + 2)= d

52 t = d
so
32 t + 64 = 52 t

20 t = 64

t = 3.2 hours and 12 minutes
==========================
check
32 * 5.2 = 166.4
52 * 3.2 = 166.4
good

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2. the freight train has a 64 km head start ... 32 kph * 2 h

the passenger train closes the distance at 20 kph ... 52 kph - 32 kph

64 / 20 = ?

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