Question

Which is faster and why 90.0 miles per hour or 121 feet per second

Answer 1

90 miles per hr :
1 mile = 5280 ft...so 90 miles = 90(5280) = 475200 ft
1 hr = 3600 seconds

475200/3600 = 132 ft per second <== this is equal to 90 miles per hr

the 90 miles per hr is faster then 121 ft per sec.