The boat goes 30km upstream and 44km downstream in 10 hours. In 13 hours, it can go 40km upstream and 55km downstream. Determine the speed of stream and that of the boating till water.
a. speed of boat = 8km/h & Speed of stream = 3km/r
b. speed of boat = 8km/h & Speed of stream = 4km/r
c. speed of boat = 7km/h & Speed of stream = 2km/r
d. data insufficient