What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?

A. 30 Years
B. 31 years
C. 26 years
D. 33 years
Explanation:
Total age seven persons = (28 * 7)years
Total age of the first three persons and the last three persons are (21 * 3) years and (34 * 3) years respectively.
Age of the person sitting in the middle of the row = 28 * 7 – 21 * 3 – 34 * 3 = 196 – 63 – 102 = 31 years

A. Rs.5000
B. Rs.4600
C. Rs.5400
D. Rs.2300
100x + 400 = 12(x – 5)
x = 50
100 * 50 + 400 = 5400