Question

A stone has a mass of 390 g and a density of 2.7 g / cm 3. Cooking oil has a density of 0.90 g / cm 3.

Which mass of oil has the same volume as the stone?

Answer 1

Answer:

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Answer 2

The mass of oil with same volume is 130 grams.

Given - Density and mass of stone and density of oil

Find - Mass of oil

Calculation - The density, mass and volume are related to each other by the formula -

$Density = \frac{mass}{volume}$

Firstly calculating volume of stone using above formula -

$volume = \frac{mass}{density}$

$volume = \frac{390}{2.7}$

Volume = 144.44 cm³

Now, calculating the mass of oil for same volume which is 144.44 cm³

$mass = volume × density$

$mass = 144.44 × 0.90$

Mass = 129.996

Rounding off, we get 130

Hence, 130 grams of oil has the same volume as the stone..

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