A student has box which contains 10 similar straws,30cm ruler and 2 set squares.Explain to determine average value for diameter of 1 straw?

1 Answer
smendyka
Feb 21, 2018

See a solution process below:

Explanation:

Place each straw tightly but without deforming the roundness of the straw into the corner of the set square.

Measure the distance from the corner of the set square to where the straw touches the set square using the 30 cm ruler. This is the radius of each straw.

Multiply this radius by #2# to obtain the diameter of each straw.

Sum the diameter of each of the 10 straws.

Divide this sum by #10# to obtain the average value for the diameter of a straw.

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