1.

A cylinder made of metal has radius 18 cm and height 40 cm. When this melts how many cylinders can be made of radius 2 cm and height 5 cm?

Answer»

Volume of the first cylinder = π r2 H = π

(18)2 × 40 = 12960 π cm3

Volume of the newly made cylinder = π (2)2 × 5 = 20π cm3

Number of the new fly made cylinders

\(\frac{12360\pi}{20\pi}\) = 648 cylindres



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