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51.If we rotate a right angled triangle of height 10 cm and base 6 cm about its base we get(I) cone of height 6 cm and base diameter 10 cm.(2) cone of height 10 cm and base diameter 6 cm.(3) cone of height 10 cm and base diameter 12 cm.(4) cone of height 6 cm and base diameter 20 cm.

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