Maye's answer to Ethel's Secondary 2 Maths Singapore question.
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Area of base = πr^2
Area of circle = 3.14(1.35)(1.35)
Area of circle = A
Area of wrap = circumference of base x height of cylinder
Area of wrap = πd x H
Area of wrap = 3.14(2.7) x 13.8
Area of wrap = B
1.2mm = 0.12cm
Material needed = 0.12(A+B)
Area of circle = 3.14(1.35)(1.35)
Area of circle = A
Area of wrap = circumference of base x height of cylinder
Area of wrap = πd x H
Area of wrap = 3.14(2.7) x 13.8
Area of wrap = B
1.2mm = 0.12cm
Material needed = 0.12(A+B)
Date Posted:
3 years ago
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