Question

An ant is moving around a few food pieces of different shapes scattered on the floor. For which food-piece would the ant have to take a longer round ? Remember, circumference of a circle can be obtained by using the expression c = 2tr, where r is the radius of the circle.
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Answer 1

Answer:

For measuring a round, circumference needs to be calculated.

(a)

c=\frac{2\pi r}{2}c=

2

2πr

=\frac{22}{7}\times\frac{1.4}{10}\times10=

7

22

×

10

1.4

×10

=4.4cm=4.4cm

Perimeter==2.8cm+4.4cm=2.8cm+4.4cm

=7.2cm

(b)

Perimeter==2.8cm+1.5cm+1.5cm+\pi\times\left(1.4\right)=2.8cm+1.5cm+1.5cm+π×(1.4)

=10.2cm

(c)

Perimeter=2cm+2cm+\pi\left(1.4\right)2cm+2cm+π(1.4)

=8.4cm

Answer 2

Answer:

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