Mean Section Method Homework: Cross Sectional Area Solution

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SUMMARY

The discussion focuses on calculating the cross-sectional area using the Mean Section Method. The user initially calculated the area as 20.25 using an incorrect average depth, but the correct calculation involves averaging the depths of 5 and 7.2 to obtain 6.1. Multiplying this average depth by the width of 4.8 yields the correct cross-sectional area of 29.28.

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  • Understanding of the Mean Section Method
  • Basic knowledge of geometry, specifically area calculations
  • Familiarity with averaging numerical values
  • Ability to perform multiplication with decimal numbers
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fonseh
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Homework Statement


I have problem of obtaining the cross sectional area .

Homework Equations

The Attempt at a Solution


Taking section 2-3 as an example , my working is [ (3.3 +4.8) / 2 ]* 5 = 20.25 , but the ans provided is 29.28 , how to get the 29.28 ?
 

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In section 2-3 the depths are

5 and 7.2

So the average depth is

(5+7.2)/2=6.1

The width is 4.8 so the area is 4.8*6.1=29.28
 
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