Olivia and Miranda plan to take stroll along
River Walk which is 600 feet long. Miranda 8)
starts early and covers a distance of 150 feet
with a speed of 3 feet per second, when
Olivia starts. Olivia initially walks with a
speed of 5 feet per second, reaches Miranda
and then they continue leisurely at a speed of
3 feet per second. What is the average speed
at which Olivia covered the entire distance?
Ignore feet per second.
Answers
Answered by
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4 ft/sec is the average speed at which Olivia covered the entire distance
Step-by-step explanation:
let say aftet t secs oliva meets mirianda
150 + 3t = 5t
=> 2t = 150
=> t = 75 secs
distance covered in 75 secs by oliva= 5×75 = 375 ft
remaining distance = 600 - 375 = 225 ft
time taken for remaining 225 ft = 225/3 = 75 secs
total time by oliva = 75 + 75 = 150 sec
the average speed at which Olivia covered the entire distance = 600/150
= 4 ft/sec
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