Question

22
1. Find the circumference of the circles with the following radius: (Take Ti=
7
(a) 14 cm
(b) 28 mm
(c) 21 cm

Answer 1

Answer:

circumfrance of circle = 2πr

1) solutions.. 2πr = 2*22/7/14= 88 ans

2) sol.. 2πr = 2*22/7*28= 176 ans

3) sol.. 2πr = 2*22/7*21= 132 ans

HOPE IT HELPS YOU...

Answer 2

Answer:

THE FORMULA THAT WILL BE USED

CIRCUMFERENCE = 22/7 X DIAMETER

DIAMETER = 2 X RADIUS

number 1

GIVEN:

RADIUS = 14 CM

diameter = 2 x 14 = 28

circumference = 22/7 x 28

                          = 22 x 4

                          = 88CM

NUMBER 2

GIVEN:

RADIUS = 28 MM

DIAMETER = 28 X 2 = 56MM

CIRCUMFERENCE = 22/7 X 56

                                = 22 X 8

                                  = 176 MM

NUMBER 3

GIVEN:

RADIUS = 21 CM

diameter = 21 x 2 = 42cm

circumference = 22/7 x 42cm

                          = 22 x 6

                          = 132cm

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