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)   (Show Source): You can put this solution on YOUR website!






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Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.
The proportion

 = 

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

It is equivalent to

 = ,

 = ,

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.



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