Question

An alloy of gold and silver weighs 50 gms. It contains 80% gold. How much gold should be added to the
alloy so that percentage of gold is increased to 90?

Answer 1

how?

Answer 2

can u plz provide the steps

Answer 3

let x be the amount of gold that needs to be added:
40+x/50+x =0.9
45+0.9x=40+x
0.1x+5
x=50

Answer 4

sorry 50 grams needs to be added

Answer 5

oh sry i misread the question!!!!!!!

Answer 6

and obviously since the alloy is 40 gold 10 silver, adding 50 gold would make the total 90/100 gold which is 90%