If the length and height of a brick increases by 10 each respectively and the breadth reduces b...........

Quantitative Aptitiude (CLAT) Percentage

If the length and height of a brick increases by 10% each respectively, and the breadth reduces by 20%, what is the percentage change in the volume of the brick?

Explanation:

Percentage change is successive of +10%, +10% and –20%.
Successive of 10% & 10% = 10 + 10 + (10×10)/100 = 21%
Now, successive of 21% and –20% = 21+ (–20) + (21× –21)/100
= 1 –4.41 = −3.41%
i.e.the volume decreases by 3.41%.
(Note: In actual question the options given were wrong).