A train goes at a constant speed. It can travel 150 miles in 2 ½ hours. How long would it take for that train to travel 100 miles?

Answer 1

100 = 2/3 pf 150

100/150 = 2/3

2/3 of 2 1/2 = (2/3)(5/2) = 5/3 = 1 2/3 hours or 1 hour and 40 minutes to go 100 miles

the train goes

50 miles in 5/6 of an hour or 50 minutes

100 miles in 2 x 5/6 = 5/3 of an hour or 1 hour & 40 minute

150 miles in 3 x 5/6 = 5/2 of an hour = 2 1/2 hours or 2 hours and 30 minutes