contestada

A girl runs up the down escalator in the mall. If the escalator is moving with a
velocity of 24 m/min and the girl is running with a velocity of 30 m/min, how far up the escalator can she go in 4 minutes?

A. 10 m
B. 30 m
C. 48 m
D. 24 m

Respuesta :

SvetkaChem

Answer:

D. 24 m

Explanation:

Running up - velocity     + 30 m/min

Escalator 's moving down  velocity   - 24 m/min

Sum velocity (30 - 24) = 6 m/min

6 m/min * 4 min = 24 m

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