Question

an alloy of chromium and nickel contains 40% chromium by weight find the weight of chromium that must be added to 550 KG of this alloy if the final percentage of chromium is to be 65​

Answer 1

Answer:

392.85 kg

Step-by-step explanation:

Chromium in 550kg of alloy

=550*40/100=220kg

Let x kg of chromium is to be added then

percent of chromium will be

100*(220+x)/(550+x)=65/1

(220+x)*100=65*(550+x)

22000+100x=35750+65x

35x=35750-22000=13750

x=13750/35=392.85 kg