Simple speed comparison problem

timer Asked: Aug 24th, 2015

Question Description

Dale starts walking to school at a constant speed. Five minutes after he leaves, Dale's sister Ruby realizes that Dale forgot his lunch. Ruby knows that she can run two times the speed that Dale is walking, or bike three times his speed. However, her bike is locked in the garage and it takes her two minutes to unlock the bike and bring it outside to ride. Should Ruby run or bike to reach Dale faster?

This question has not been answered.

Create a free account to get help with this and any other question!

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors