SOLUTION: Three miners can load 350 pounds of coal in 15 minutes.How many minutes would it take for two miners to load 700 pounds of coal.

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Question 1082369: Three miners can load 350 pounds of coal in 15 minutes.How many minutes would it take for two miners to load 700 pounds of coal.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) About Me  (Show Source):
Answer by ikleyn(52777) About Me  (Show Source):
You can put this solution on YOUR website!
.
The proportion

350%2F%283%2A15%29 = 700%2F%282%2Ax%29

express the rate of work for each of the two scenarios.

It is equivalent to

350%2F%283%2A15%29 = 350%2Fx,

1%2F45 = 1%2Fx,

x = 45.

Answer. 45 minutes.

This method is   a)  simplest   and   b) it works ALWAYS.

So, I recommend it to you for using in the most difficult cases.

To see more solved problems of this type, look into the lesson
    - Rate of work problems
in this site.