Test Index

JAMB Physics 2010 Paper

Question : 11

Total: 47

^{-3}

^{3}

^{-3}

assuming no loss of oil due to spillage?

Solution:

Concept:

When oil is fried, its mass remains constant. Only its density and volume change.

Explanation:

First, find the mass of the oil using the final density and final volume.

\text{Mass} = \text{Density} \times \text{Volume}

\text{Mass} = 0.4 \, \text{kgm}^{-3} \times 20 \, \text{m}^{3}

\text{Mass} = 8 \, \text{kg}

Since no oil is lost, this mass is the same at the initial state.

Now, calculate the initial volume using the initial density.

\text{Initial Volume} = \frac{\text{Mass}}{\text{Initial Density}}

\text{Initial Volume} = \frac{8 \, \text{kg}}{0.8 \, \text{kgm}^{-3}}

\text{Initial Volume} = 10 \, \text{m}^{3}

Answer:

The initial volume is

10 \, \text{m}^{3}

, which is option B.

Go to Question:

Prev Question

Next Question