Periyar University 2008 B.E Electronics

Sol: A indicates 11:57, B indicates 12:03, C indicates 12:02 and D indicates 11:06 therefore,

Max time is for B





90) Falling height is proportional to square of the time. 1 object falls 64cm in 2sec than in 6sec from how much height the object will fall.

Sol: The falling height is proportional to the square of the time.


Now, the falling height is 64cm at 2sec

So, the proportional constant is=64/ (2*2) =16;

So, at 6sec the object fall maximum (16*6*6) cm=576cm;

Now, the object may be situated at any where.

If it is>576 only that time the object falling 576cm within 6sec .Otherwise if it is situated<576 then it fall only that height at 6sec.




91) Last year pandit was thrice his sister's age. Next year he is only twice her age. After five years what is pandit's age.
a) two b) 12 c) 11 d) 14

Ans: b



92) Jalia is twice older than qurban. If jalia was four years younger, qurban was three years older their diff. ranging from their ages is 12 years what is the sum of their ages

a) 67 b) 57 c) 36 d) none

Ans: b



93) Fathers age is five times his son's age. four years back the dad was nine times older than son. obtain the fathers' current age.

Ans. 40 years
94) Joe’s dad will be twice his age six years from now. His mother was twice his age two years before. If Joe will be 24 2 years from now, what is the difference ranging from his father's and mother's age?

a) four b) six c) eight d) 10




95) Anand finishes a work in seven days; Bittu finishes the identical job in eight days and Chandu in six days. They take turns to finish the work. Anand on the 1st day, Bittu on the 2nd and Chandu on the 3rd day and then Anand again and so on. On which day will the work get over?

a) 3rd

b) 6th

c) 9th

d) seventh


In d first day Anand does 1/7th of total work

Similarly,

Bithu does 1/8th work in d second day

Hence at the end of three days, work done = 1/7+1/8+1/6=73/168

Earning:   Approval pending.