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Tony rode a bicycle from A to B in 36 \36 km/h. After that, Tony went back from B to A in 48 km/h. It took 3 and a half hours to go from A to B and back to A. Assuming that Tony never have any rest, what is the distance between A and B?

 Jun 27, 2020
 #1
avatar+307 
+1

Let thhe distance between A and B be \(d\).

Since distance/speed=time, \(\frac{d}{36}+\frac{d}{48}=\frac{7}{2}\).

Multiplying both sides by 144, we get \(4d+3d=504\)

\(7d=504\)

\(d=72\)

 Jun 27, 2020
 #2
avatar+28021 
+1

Distance is 2d

rate x time = distance

36t1 = 48(3.5-t1)

t1 = 2 hrs         2 hrs at 36 km/hr = 72 km

 Jun 27, 2020

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