An ant is moving around a …
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An ant is moving around a few food pieces of different shapes scattered on the floor.For which food-pieces would the ant have to take a longer round?Remember circumference of the circle can be obtained by using the expression c=2×22÷7×r, where r is the radius of the circle.
Posted by Krish Kataria 6 years, 8 months ago
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Sia ? 6 years, 8 months ago
= {tex}\pi (\frac{2.8}{2}){/tex} cm + 2.8 cm
= {tex}\frac{22}{7} \times{/tex} 1.4 cm + 2.8 cm
= 4.4 cm + 2.8 cm
= 7.2 cm
= 2.8 cm + 1.5 cm + 1.5 cm + {tex}\pi (\frac{2.8}{2}){/tex} cm
= 5.8 cm + {tex}\frac{22}{7} \times{/tex} 1.4 cm
= 5.8 cm + 4.4 cm
= 10.2 cm
= 2 cm + 2 cm + {tex}\pi (\frac{2.8}{2}){/tex} cm
= 4 cm + {tex}\frac{22}{7} \times{/tex} 1.4 cm
= 4 cm + 4.4 cm
= 8.4 cm
Therefore, the ant would have to take a longer round for food pieces (b).
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