Answer:
The Sarah will arrive at 5.00 P.M..
Step-by-step explanation:
Distance covered by Sarah = D = 30 miles
Time taken by Sarah to travel 30 miles = T
Speed by which Sarah cycling = S = 10 mile/hr



Sarah will reach her grandmother's house in 3 hours.
If she leaves the home at 2.00 P.M. ,then she will reach at her grandmother's house by 5.00 P.M..