John rode 3150 m at an average speed of 350 m/min. If he had ridden at average of 375 m/min instead, how much sooner would it have taken?

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

0.19 m/s and 0.45 m/s

-4 on

the answer is a. hope this .