One plastic bead weighs $20\ mg$. What will be the weigh in grams of a string of these beads containing $120$ beads?

Given: One plastic bead weighs $20\ mg$.

To do: To the weigh in grams of a string of these beads containing $120$ beads.

Solution:

$\because$ Weight of the one bead$=20\ mg$

$\therefore$ Weight of the string containing$=120\times20$

$=2400\ mg$

$=2400\times\frac{1}{1000}$                              [$\because 1\ mg=\frac{1}{1000}\ gram$]

$=2.4\ gram$

Thus, weight of a string containing $120$ beads is $2.4\ gram$.

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Updated on: 10-Oct-2022

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