two bicyclists, Jack and Jill, are taking the same route. Jack leaves at 7:00 a.m. at a constant speed of 10 mph. Jill leaves at 7:30 a.m. also at a constant speed. At 7:45 a.m., Jack is 5.5 miles ahead of Jill.
a) How fast is Jill going?
b) How long will it take her to travel 40 miles

Question

anonymous · Answer

(a) 8 miles per hour
(b) 5 hours

anonymous · Answer

can you show me how did you get the answers ahan98 ?

anonymous · Answer

7:00 to 7:45 = 45 minutes
45 minutes = 3/4 of an hour
Jack traveled 7.5 miles (3/4 * 10)
Then 7:30 - 7:45 = 15 minutes (1/4  of an hour)
Jill traveled (7.5 - 5.5 = 2) miles.
2 * 4 = 8 mph

For (b) You have distance = rate * time 
40 = 8 * time
time = 5 hours

anonymous · Answer

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