The density of 400cm³ of palm oil was 0.9 g/cm³ before frying. If the density of the oil was 0.6 g/cm³ …..

Jamb 1979

The density of 400cm³ of palm oil was 0.9 g/cm³ before frying. If the density of the oil was 0.6 g/cm³ after frying, assuming no loss of oil due to spilling, its new volume was A. 360cm³ B. 600cm³ C. 240cm³ D. 800cm³ E. 450cm³

ANSWER: Option B

EXPLANATION: since

Density = mass/volume and the question pointed out that assuming no loss of oil due to spilling, it means that the mass is conserved. 

So we have density × volume = constant

From there, we can have 

D1 × V1 = D2 × V2

Substitute the values inside that formula to arrive at your answer!

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