Question

A is 50% more than B, C is 4/7th of A and D is 40% more than C. Now, each of A, B, C and D is increased by 10%. Find what per cent of B is D (after the increase)?

• A. 120%
• B. 132%
• C. 140%
• D. 154%

Answer 1

The correct option is A 120%

$A=\frac{3}{2}BC=\frac{4}{7}A\Rightarrow C=\frac{4}{7}\times \frac{3}{2}B=\frac{6}{5}BandD=\frac{7}{5}C=\frac{7}{5}\times \frac{6}{7}B=\frac{6}{5}B$
After the increase, 1.1B and 1.32 B
Required $\%=\frac{1.32}{1.1}\times 100=120\%$