d = rt
t = d/r
The times are the same.
340/(r + 35) = 270/r
Cross multiply.
340r = 270r + 9450
70r = 9450
r = 135 mph
135 + 35 = 170 mph
Julia B.
asked 11/11/20Train A has a speed 35 miles per hour greater than that of train B. If train A travels 340 miles in the same times train B travels 270miles, what are the speeds of the two trains?
d = rt
t = d/r
The times are the same.
340/(r + 35) = 270/r
Cross multiply.
340r = 270r + 9450
70r = 9450
r = 135 mph
135 + 35 = 170 mph
Get a free answer to a quick problem.
Most questions answered within 4 hours.
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.