Answer:
10 hours
Step-by-step explanation:
Two boats leave a port at the same time, one going north and the other traveling south.
Southbound boat rate = 40 mph
The northbound boat travels 18 mph faster than the southbound boat.
Northbound boat rate = 40 + 18 = 58 mph
Two boats rate = 40 + 58 = 98 mph (this means they are apart 98 km after one hour)
Total distance = 980 miles
Total rate = 98 mph
Time [tex]=980:98=10[/tex] hours
