Question

A piece of coal has a mass 40kg and volume of 15cm³. Find its density​

Answer 1

Answer:

3.0 g/cm3

Step-by-step explanation:

Problem 1: You have a rock with a volume of 15cm3 and a mass of 45 g. What is its density? Density is mass divided by volume, so that the density is 45 g divided by 15cm3, which is 3.0 g/cm3.

Answer 2

$\boxed{ \underline{ \underline{\footnotesize\tt{Given:- }}}} \: \blue☆$

$\: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\tt{Mass - 40kg}$

$\footnotesize\tt{1kg= 1000g}$

$\footnotesize\tt{40kg= 40 \times 1000g}$

$\footnotesize\tt{ \: \: \: \: \: \: \: \: \: = 40000g}$

$\: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\tt{Volume = 15 {cm}^{3} }$

$\: \: \: \: \: \: \: \: \: \: \: \: \:$

$\boxed{ \underline{ \underline{\footnotesize\tt{Solution:- }}}} \: \blue☆$

$\: \: \: \: \: \: \: \: \: \: \: \: \:$

$\footnotesize\tt{Density = \frac{Mass}{Volume} }$

$\footnotesize\tt{Density = \frac{40000g}{15 {cm}^{3} } }$

$\footnotesize\tt{Density = \frac{ \cancel{40000}g}{ \cancel{15 }{cm}^{3} } }$

$\boxed{ \underline{ \underline{\footnotesize\tt{Density = 2666.66 \: g {cm}^{3} }}}} \: \blue☆$