Question

15. How many lead balls, each of radius 1 cm, can be made from a sphere of
radius 8 cm?
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Answer 1

Answer:

volume of big sphere/ volume of lead balls = no. of balls

volume of sphere=

that is

4/3πr^3

4/3 × 3.14 × 8×8×8 = 2143.57

next

volume of lead balls=

4/3 × 3.14 × 1 ×1×1 = 4.186

no. of balls = 2143.57/4.186

= 512 (approx)

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