Question

Calculate the mass of a lead cylinder which is
10 cm long and 3 cm in diameter. Take density of
lead = 11.40 g cm​

Answer 1

Given:-

• height of lead cylinder = 10cm

• diameter = 3cm, r = 3/2

To Find:-

• Mass of lead cylinder.

Solution:-

• Density = $\frac{mass}{Volume}$

• Mass = density × volume

Now ,

• → volume of lead cylinder = πr²h

• => π( $\frac{3}{2}$)² × 10

• => $\frac{495}{7}$ cm³

Therefore, mass of lead cylinder

• => $\frac{495}{7}$ × 11.40 g

• => 806.14 g

________________________________________

hope it helps!!

Answer 2

Explanation:

Given:-

height of lead cylinder = 10cm

diameter = 3cm, r = 3/2

\begin{gathered}\\ \\\end{gathered}

To Find:-

Mass of lead cylinder.

\begin{gathered}\\ \\\end{gathered}

Solution:-

Density = \frac{mass}{Volume}

Volume

mass

Mass = density × volume

\begin{gathered}\\ \end{gathered}

Now ,

→ volume of lead cylinder = πr²h

=> π( \frac{3}{2}

2

3

)² × 10

=> \frac{495}{7}

7

495

cm³

\begin{gathered}\\ \end{gathered}

Therefore, mass of lead cylinder

=> \frac{495}{7}

7

495

× 11.40 g

=> 806.14 g