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N76 [4]
2 years ago
9

The product of the ages of three children is 1872. The age of the middle child is the average of the ages of the other two child

ren. What is the sum of their ages
Mathematics
1 answer:
sergejj [24]2 years ago
7 0

The total age of the three children are = 37years

<h3>Calculation of the total age of children</h3>

The product of the ages of three children is = 1872.

Let take child 1 = x

child 2 = x

child. 3 = x

Therefore, the age of three children = x³= 1872

Therefore;

x =  \sqrt[3]{1872}

X = 12.32448

The age of the middle child = 12.32448 + 12.32448

= 24.64896/2

= 12.32448

Therefore the sum of their ages = 12.32448 + 12.32448 + 12.32448 = 37years.

Learn more about age calculation here:

brainly.com/question/2744275

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A metalworker has a metal alloy that is 25% copper and another alloy that is 60% copper.How many kilograms of each alloy should
Neporo4naja [7]

Answer:

20kg of 25% copper alloy

30kg of 60% copper alloy

Step-by-step explanation:

There are 2 kinds of metal, first metal(A) have 25% copper while the second metal(B) has 60% copper. The metalworker want to create 50kg of metal, which means the total weight of both metals is 50kg (A+B = 50). The metalworker also want the metal made of a 46% which is 23kg(0.25A + 0.6B = 0.46*50). From these sentences, we can derive 2 equations. We can solve this with substitution.

A+B = 50

A= 50-B

Let's put the first equation into the second.

0.25A + 0.6B = 0.46 *50

0.25(50-B) + 0.6B =23

12.5 - 0.25B + 0.6B =23

0.35B=23 -12.5

B= 10.5/ 0.35= 30

Then we can solve A

A= 50-B

A= 50-30

A=20

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