Sara runs several times a week and always keeps track of how much time she runs each time she goes out. One day she forgets to take her stopwatch with her and wonders if she can still have some idea of her running time. As she passes a particular pond, she remembers that it is 5.6 km from her house. She knows from her previous training that she has a consistent pace of 3.4 m/s. How long has Sara been running when she reaches the pond?

A) 16 minutes

B) 27.5 seconds

C) 27.5 minutes

D) 1 hour

Question

Mathematics

Justice Haney

30 January, 23:14

Sara runs several times a week and always keeps track of how much time she runs each time she goes out. One day she forgets to take her stopwatch with her and wonders if she can still have some idea of her running time. As she passes a particular pond, she remembers that it is 5.6 km from her house. She knows from her previous training that she has a consistent pace of 3.4 m/s. How long has Sara been running when she reaches the pond?

A) 16 minutes

B) 27.5 seconds

C) 27.5 minutes

D) 1 hour

+4

Answers (1)

Know the Answer?

Xavier Huerta · Answer 1

We are given with two data : 5.6 km of distance from the house to a pond and 3.4 m/s constant pace of running. In this case, we are asked the time Sara reached the pond from the house, that is time is equal to displacement over rate. Substituting, time = 5.6 x 103 m / 3.4 m/s equal to 1647.06 s or C. 27.5 minutes.