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Karo-lina-s [1.5K]
3 years ago
12

A sliver of gold has a volume of 0.678 cm3. What is the mass of this sliver of gold?

Mathematics
1 answer:
Aliun [14]3 years ago
5 0

Answer - 13.098 gm

Description -

Dear student,

As we know Density= \frac{Mass}{Volume}

⇒ Mass = Density * Volume

so multiplying given Volume with the Density of gold ,we can calculate the mass of the gold . Density of gold at room temp. is 19.32 grams per cubic centimeter.

so mass of the sliver of gold = 19.32 * 0.678 = 13.098 (ans)


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The first mechanic worked for 10 hours and the second mechanic worked for 15 hours.

Step-by-step explanation:

Given,

Charges of first mechanic = $95 per hour

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Total amount charged = $2675

Let,

The number of hours worked by first mechanic = x

The number of hours worked by second mechanic = y

According to given statement;

x+y=25    Eqn 1

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Multiplying Eqn 1 by 95

95(x+y=25)\\95x+95y=2375\ \ \ \ Eqn\ 3

Subtracting Eqn 3 from Eqn 2

(95x+115y)-(95x+95y)=2675-2375\\95x+115y-95x-95y=300\\20y=300

Dividing both sides by 20

\frac{20y}{20}=\frac{300}{20}\\y=15

Putting y=15 in Eqn 1

x+15=25\\x=25-15\\x=10

The first mechanic worked for 10 hours and the second mechanic worked for 15 hours.

Keywords: linear equation, elimination method

Learn more about elimination method at:

  • brainly.com/question/12700460
  • brainly.com/question/12773544

#LearnwithBrainly

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