Question

an alloy consists of 40 percent zinc, 15 percent copper and rest nickel find the mass of nickel in 800g alloy ​

Answer 1

Answer:

Nichel = (100% - 30 % - 40 % )

= 30 %

Alloy = 20kg

Nichel = 30×20/100=6kg

Answer 2

$\large\underline\mathtt\red{Solution:}$

An alloy consists of 30% zinc, 45% nickel copper % = 100 - (30 % +45%)

= 100-75

= 25%

weight copper = 25% of 800 g

= 1/4 * 800g

= 200g