Question

Exercise 17.3
1. Find the circumference of circles with the following radius: Take te
(i) 14 cm
(ii) 21 cm (iii) 42 mm (iv) 56 m
29​

Answer 1

Answer:

1 . circumference = 2*3.14*14=88. 2. 2*3.14*21=132. 3. 2*3.14*42= 264.

Step-by-step explanation:

by this method you can do it easily

Answer 2

Answer:

step by step explanation

1.radius=14cm

circumference=2πr

2*22/7*14

88cm.

2. radius=21cm

circumfence=2πr

2*22/7*21

132cm.

3. radius= 42

change mm into cm

then it becomes 4.2 cm

circumference=2πr

2*22/7*4.2

26.4cm

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