Find the missing values in the following table for the circles with ra

Find the missing values in the following table for the circles with radius (r), diameter (d) and Circumference (C).S. No.radius (r)diameter (d)circumference (C)(i)15 cm(ii)1760 cm(iii)24 m

Answer»

(i) Given radius r = 15 cm

∴ diameter d = 2 x 15

= 30 cm

Circumference C = πd units

= \(\frac{22}{7}\) x 30

= \(\frac{660}{7}\)

= 94.28 cm

(ii) Given circumference C = 1760 cm

2πr = 1760

2 x \(\frac{22}{7}\) x r = 1760

r = \(\frac{1760\times7}{2\times22}\)

= \(\frac{160\times7}{2\times2}\)

= 40 x 7

= 280 cm

Diameter = 2 x r

= 2 x 280

= 560 cm

(iii) diameter d = 24m

radius r = \(\frac{d}{2}\)

= \(\frac{24}{2}\)

= 12 m

Circumference C = 2 πr units

= 2 x \(\frac{22}{7}\) x 12

= \(\frac{528}{7}\)

= 75.4 m

Tabulating the results