1. Marbles of diameter 1.4 cm are dropped into a cylindrical beaker containing some water and are fully submerged. The dia meter of the beaker is 7 cm. Find how many marbles have been dropped in it if the water rises by 5.6 cm.
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By: anil on 05 May 2019 02.01 am
Volume of 1 marble = $$frac{4}{3}pi r^{3}$$ = $$frac{4}{3}pi 0.7^{3}$$
Volume of water due to n marbles = $$pi r^{2} h$$ = $$pi 3.5^{2} 5.6$$
No. of marbles = $$frac{pi 3.5^{2} 5.6}{frac{4}{3}pi 0.7^{3}}$$
= 150
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Volume of water due to n marbles = $$pi r^{2} h$$ = $$pi 3.5^{2} 5.6$$
No. of marbles = $$frac{pi 3.5^{2} 5.6}{frac{4}{3}pi 0.7^{3}}$$
= 150