Question

in a particular type of alloy the ratio of lead to tin 5:6 the amount of lead should be added to 12.1 kg of this material to make the ratio 1:1is

options
a 1.1kg
b.1 kg
c.0.9kg
d.1.5kg​

Answer 1

Answer:given

lead / tin = 5:6

let the added mass be x

12.1 = 5 / 6

12.1+x=1/1

here the mass of lead is taken as x

12.1=5x/6

12.1X6/5=x

x=13.52kg

13.52-12.1= 1.5 kg in approx

Step-by-step explanation:

Answer 2

Option 'a' is correct.

Step-by-step explanation:

Since we have given that

Ratio of lead to tin = 5 :6

So, the amount = 12.1 kg

So, Amount of lead would be

$\dfrac{5}{11}\times 12.1\\\\=5\times 1.1\\\\=5.5\ kg$

Amount of tin would be

$\dfrac{6}{11}\times 12.1\\\\=6\times 1.1\\\\=6.6\ kg$

So, the ratio becomes = 1: 1

According to question, it becomes,

$\dfrac{5.5+x}{6.6}=\dfrac{1}{1}\\\\5.5+x=6.6\\\\x=6.6-5.5\\\\x=1.1\ kg$

Hence, 1.1 kg of lead should be added.

Therefore, Option 'a' is correct.

# learn more:

60 kg of an alloy a is mixed with 100 kg of alloy

b.If alloy a has lead and tin in the ratio 3:2 and alloy b has tin and copper in the ratio 1:4 ,then the amount of tin in the new alloy is:

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