A train travels 42 kilometers in 15 minutes. How far will the train travel in 3 hours at that speed? A. 168 km B. 336 km C. 504 km D. 672 km
Mathematics · High School · Thu Feb 04 2021
Answered on
Given:
A train travels 42 km in 15 minutes.
Determine how far will the train travel in 3 hours at that speed.
d = 42 km
t = 15 minutes or ¼ hours
Formula for velocity:
v = d/t
d = tv
t = d/v
v = velocity
d = distance
t = time
Solution:
Substitute the given values of d and t to the formula for velocity.
v = 42km/ ¼ h
v = (42 km/h)(4)
v = 168 km/h
Substitute the values of v and t = 3 to the formula for d.
d = tv
d = (168 km/h)(3 h)
d = 504 km
Final answer:
C. 504 km