Question 967638: Several men can paint a bridge in 15 days
a)how long would it take three men to paint the same bridge?
b)the bridge was painted in t days. Write down an expression, in terms of t, for the number of men needed to paint the bridge
Answer by josgarithmetic(39618)   (Show Source):
You can put this solution on YOUR website! The description is too imprecise to answer. As started, an unknown quantity of men do one job in 15 days, at an unknown rate per man. The two questions give no further values.
No finished value is possible.
Here is a way to show what can be done:
s, how many men is "several";
r, the rate for one man in JOBS per DAY
t, the number of days, an unknown, for n men to do a job.
For question #a,
but you do NOT know s, r, or t. Yet you only have two equations.
You can eliminate r, and have a formula still with unknowns s and t;
you can plug-in the given value for n=3, but still you have three UNKNOWNS and just two equations. Or you might just have a formula without r, but still using unknowns s and t.
#b,
You may be able to do something with this one, because it asks for an "expression". Be careful to reassign any variables if needed.
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