Nine days ago, the area covered by the mold on a piece of bread was 3 square inches. Today the mold covers 9 square inches. What is the rate of change in mold’s area?

Aptitude and Reasoning MCQ Questions with Solutions

Nine days ago, the area covered by the mold on a piece of bread was 3 square inches. Today the mold covers 9 square inches. What is the rate of change in mold’s area??

A) 2 square inches per day
B) 3 square inches per day
C) 2/5 square inches per day
D) 2/3 square inches per day

Answer & Description:

D) 2/3 square inches per day

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