Question

if 101 rupees coins weight 485 g then how much will 10000 coins weight

Answer 1

weight of coins (in kg) :: coins (number)
485 : x :: 101:10000
485×10000 = 101x
(485×10000) ÷ 101 = x

Answer 2

Given,
101 coins weight 485 g
therefore,weight of 1 coin=485/101 g
=4.80 g
Therefore weight of 10000 coins=4.80*10000 g
=48000g