Question

Alice and Bob start walking toward each other when they are 111.8 m apart. Alice has a speed of 1.8 m/s and Bob has a speed of 1.4 m/s. Alice's dog Spot starts at her side at the same time and runs back and forth between them at 6.5 m/s. By the time Alice and Bob meet, what distance has Spot run in meters? Select one: A. 113.5 B. 151.4 C. 252.3 D. 227.1 E. 283.9

Answer 1

They are approaching at speed 1.8 + 1.4 = 3.2 m/s

T = 111.8 / 3.2 = 34.94 sec to reach each other

S = V T where V = 6.5 m/s Spot's speed

6.5 m/s * 34.9 = 227.1 m

(D) 227.1 m the distance Spot has to run