Exim Bank Ltd. recruitment Exam

41. If the sides of a square is increased by 10%, by what percent will the area of the square be increased?
(a) 16%                   (b) 21%                       (c) 32%                   (d) 100%
Ans. (b) 21%

42. 10% of 80 is equal to what percentage of 40 ?
(a) 8%                      (b) 5%                        (c) 10%                     (d) 20%
Ans. (d) 20%

43. What is 10% of 20% of 30% ?
(a) 0.006%            (b) 0.6%                 (c) 6%                       (d) 60%
Ans. (b) 0.6%
Explanation:

10\% \times 20\% \times 30\%
= \frac{{10}}{{100}} \times \frac{{20}}{{100}} \times 30\%
= \frac{1}{{50}} \times 30\%
= 0.6\%