A 30ft long board is cut into 2 pieces. The ratio of the lengths of the 2 pieces is 2:3. What is the length, to the nearest foot, of the shorter piece?

How can you conclude that it is 12?

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- January 25th 2008, 01:48 PMdonnagirlRatios problem
A 30ft long board is cut into 2 pieces. The ratio of the lengths of the 2 pieces is 2:3. What is the length, to the nearest foot, of the shorter piece?

How can you conclude that it is 12? - January 25th 2008, 01:53 PMKrizalid
For these problems, think always to set a constant.

You have a condition which says that the ratio of the lengths of the 2 pieces is 2:3.

So let be such lenghts. (Where is a positive constant.)

But you know that board's lenght is 30 ft, so it means and

The rest follows.