Maths-
General
Easy
Question
The figure alongside shows the cross-section of a concrete wall to be constructed. It is 3m wide at the top, 5.5 m wide at the bottom and its height is 10 m and its length is 500m.Calculate
(i) the cross-sectional area
- 40.5
- 41.5
- 42.5
- 43.5
The correct answer is: 41.5
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Show the conjecture is false by finding a counterexample.
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