A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.154. Find the unknown rate of two blankets?
Options:
(A) 420
(B) 550
(C) 490
(D) 450
(E) 457

10 * 154 = 1540
3 * 100 + 5 * 150 = 1050
1540 1050 = 490 So the answer is: (C).

Anil can do a work in 15 days while Sunil can do it in 25 days. How long will they take if both work together?
Options:
(A) 3 4/9 days
(B) 8 4/9 days
(C) 9 3/8 days
(D) 6 3/8 days
(E) none of these

1/15 + 1/25 = 8/75
75/8 = 9 3/8 days So the answer is: (C).

In what time will a railway train 120 m long moving at the rate of 70 kmph pass a telegraph post on its way?
Options:
(A) 3 sec
(B) 4 sec
(C) 5 sec
(D) 6 sec
(E) 7 sec

T = 120/70 * 18/5 = 6 sec So the answer is: (D).

The price of a T.V. set worth Rs. 20000 is to be paid in 20 installments of Rs. 1000 each. If the rate of interest be 6% per annum, and the first installment be paid at the time of purchase, then the value of the last installment covering the interest as well will be?
Options:
(A) 19002
(B) 19028
(C) 27788
(D) 19000
(E) 27711
Money paid in cash = Rs. 1000
Balance payment = (20000 - 1000) = Rs. 19000 So the answer is: (D).