Answer :
55 miles=88513.9 m so A is 88,000 m/hr.
55 miles=88.5139 km and 1 hr=60 sec so B is 88.5139/60 which is 1.5 km/s
88513.9/60=1400 m/s
55 miles=88.5139 km and 1 hr=60 sec so B is 88.5139/60 which is 1.5 km/s
88513.9/60=1400 m/s
