Question

An alloy contains 20% copper, 35% zinc and the rest is nickel. How much is nickel in 1.5 kg alloy.

Answer 1

Answer:

n YOUR website!

an alloy contains 32% of copper 40% zinc and remaining nickel .find in grams the quantity of each of the content in a sample of 1 kg of alloy

:

Find the percent nickel: 100 - 32 - 40 = 28% nickel

1 kg = 1000 grams

.28*1000 = 280 grams of nickel

.32*1000 = 320 grams of copper

.40*1000 = 400 grams of zinc

--------------------------------

check total: 1000 grams

Answer 2

Answer:

Required quantity of Nickel is $\frac{27}{40} \: kg$

Step-by-step explanation:

Given, An alloy contains 20% copper, 35% zinc and the rest is nickel.

Let, Quantity of total alloy be x kg.

According to question,

Quantity of copper in alloy = 20% of x

$= \frac{20}{100} \times x$

Quantity of Zinc in alloy = 35% of x

$= \frac{35}{100} \times x$

Quantity of Nickel in alloy = {100-(20+35)}% of x = 45% of x

$= \frac{45}{100} \times x$

Ratio of Copper,Zinc, Nickel =

$\frac{20 \times x}{100} \ratio \frac{35 \times x}{100} \ratio \frac{45 \times x}{100} \\ = 20\ratio35\ratio45 \\ = 4\ratio7\ratio9$

So, quantity of Nickel in 1.5 kg alloy =

$\frac{9}{4 + 7 +9 } \times 1.5 \\ = \frac{9}{20} \times 1.5 \\ = \frac{9}{20} \times \frac{15}{10} \\ = \frac{9 \times 3}{4 \times 10} \\ = \frac{27}{40}$

This is a problem of percentage.

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