A column of soldiers is approaching a bridge that is exactly 378 meters long. It takes the whole column 7 minutes to pass the first post at the beginning of the bridge. It takes the whole column of soldiers 25 minutes to clear up the entire bridge. The soldiers are moving at a constant speed. What is the length of the column of soldiers and at what speed did they move?
asked Jan 4 in Word Problem Answers by anonymous

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:

To avoid this verification in future, please log in or register.

2 Answers

answered Jan 5 by Mathical Level 10 User (55,420 points)
Let S=length of the column and V be their speed.

S=7V is the equation for passing the first post.

378=25V is the equation for crossing the bridge, so V=378/25=15.12 m/min.

So S=7*15,12=105.84m.
answered Jan 5 by Rod Top Rated User (429,080 points)
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
78,072 questions
81,863 answers
1,826 comments
61,238 users