Mathematics, 10.10.2019 10:30 Lorettareneemills
Ram can complete the work in 10 hours, ajit in 12 hours and suresh in 15 hours. all of them began the work together, but ram had to leave the work after 2 hours of the start and ajit left 3 hours before the completion of the work. how long did the work last? select one:
a. 7 hrs
b. 8 hrs
c. 9 hrs
d. cannot be determined
Answers: 3
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Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.
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