Please help!

Question

Pedro and Alice raced two model trains along two straight tracks.
Pedro's train travelled 7.5 cm every minute. Alice's train travelled 7.5 cm every second.
How many centimeters had Alice's train travelled when Pedro's train had travelled 2.75 metres?

Thank You

Answer 1

Pedro's rate = 7.5 cm/min = 450 cm/s
time for Pedro's train to go 275 cm = 275/450 s
= 11/18 seconds

so in that time Alices slow train went
(11/18)(7.5) = 55/12 cm
or appr 4.58 cm