Question

An alloy is made of 30% copper, 45% nickel and rest of zinc. Find the mass of zinc in 640gm of the alloy.​

Answer 1

Answer:

Step-by-step explanation:

copper = 30% , nickel = 45%

copper + niickel = 30% + 45% = 75%

rest mass is of zinc

= (100 - 75)% = 25%

total mass of alloy = 640g

Mass of zinc in alloy

= 25% of 640

= 25 × 640/ 100 = 160g

Answer: mass of zinc in alloy = 160g