13. A tennis ball is of diameter 7.0 cm. What is its
volume in (a) cm3 (b) m3?
[(a) 179.6 cm3 (b) 0.0001796 m3)
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Given:-
- Diameter of ball = 7.0 cm means 7 cm.
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To find:-
- Volume of ball.
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We know that
✶ Volume of sphere = ⁴/₃ πr³
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In which r is Radius
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R = D/2
R = 7/2 cm
R = 3.5 cm
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Put the values
⇒ ⁴/₃ × ²²/₇ × (3.5)³
⇒ ⁴/₃ × ²²/₇ × 42.875
⇒1.333 × 3.14 × 42.875
⇒ 179.59 cm³(approx)
Therefore, Volume of ball is 179.59 cm³(approx).
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More information:-
- Ball is a type of sphere.
- So the volume of ball and sphere will be same.
- Volume of sphere is ⁴/₃ πr³ . In which r is Radius.
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