Mathematics (Syllabus D) · Oct / Nov 2016 · Paper 12 · Question 21
4024
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[The volume of a sphere is r 3 4 3 r ] During a storm, raindrops fall into a cylinder which stands on horizontal ground. The cylinder was empty before the storm started. The cylinder has radius 20 mm. Each raindrop is a sphere of radius 2 mm. After the storm, the depth of water in the cylinder is 16 mm. Calculate the number of raindrops that fell into the cylinder. Answer [3]
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