Andrew M. answered • 11/29/17

Tutor

New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

We went 72 kph for 4/9 of the distance. The rest of the trip will be a distance of (5/9)d

where d represents the total distance travelled.

**(5/9)d = 60 km distance for 2nd part**

Total distance = 60(9/5) = 108 km

**(4/9)(108) = 48km for first part of the trip**

So: We went 72 kph for 48 km, then 75 kph for 60 km

d = rt

Part 1:

48 = 72t

t = 48/72 = 2/3 hours =

**40 minutes**Part 2:

60 = 75t

t = 60/75

t = 0.8 hours = (0.8 hours)(60 mins/hour) =

**48 minutes**Total time: 40 minutes + 48 minutes = 88 minutes =

**1 hour 28 minutes**