Question

4. Find the length of the wire of diameter 2/5 cm that can be drawn from
a solid sphere of radius 9 cm​

Answer 1

Answer:

Volume of sphere = volume of pipe

4/3 pie r ^3 = pie r ^2 h

4/3 × 22/7 ×9×9×9 = 22/7 ×2/10×2/10× h

4 ×3×9×9 = 2/10×2/10× h

h = 4×3×9×9×10×10 / 2× 2

h = 8100 cm

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