Q : 3      A soft drink is available in two packs – (i) a tin can with a rectangular base of length 5 cm and width 4 cm, having a height of 15 cm and (ii) a plastic cylinder with circular base of diameter 7 cm and height 10 cm. Which container has greater capacity and by how much? 

Answers (1)

Given, 

(i) The dimension of the rectangular base of the tin can = 5\ cm\times4\ cm

Height of the can = h = 15\ cm

\therefore The volume of the tin can = Rectangular\ area\times height

(5\times4\times15)\ cm^3 = 300\ cm^3

(ii) The radius of the circular base of the plastic cylinder = r = \frac{7}{2}= 3.5\ cm

Height of the cylinder = h = 10\ cm

\therefore Volume of the plastic cylinder = \pi r^2 h

\\ = \frac{22}{7}\times (3.5)^2 \times10 \\ = 22\times0.5\times3.5\times10 \\ = 11\times35 \\ = 385\ cm^3

Clearly, the plastic cylinder has more capacity than the rectangular tin can.

The difference in capacity = (385-300)\ cm^3 = 85\ cm^3

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