$100$ one rupee coin weighs $485$ g. What is the weight of $10000$ coins?

Given:
Weight of $100$ one rupee coin $=485 g$

To find:
Weight of $10000$coins

Calculation:
Weight of $1$ one rupee coin $=\frac{485}{100}=4.85g$

Weight of $10000$ coin $=4.85\times 10000=48500 g$

Since, $1 kg = 1000 g$, we can write

Weight of $10000$ coin $=\frac{48500}{1000}=48.5 kg$

Hence, correct answer is Option C.