question: A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 19 seconds. What is the length of the platform in meters?
Options:
(A) 220 meters
(B) 360 meters
(C) 420 meters
(D) 600 meters
(E) Cannot be determined
answer: Stream of consciousness: Speed of the train in metres/sec = 72000/3600 = 20
Distance travelled by train to cross the platform = 30 * 20 = 600 = Length of train + Length of platform
Distance travelled by train to cross the man = 19 * 20 = 380 = Length of train
Length of platform = 600 - 380 = 220 The answer is (A).

q: A train 560 m in length crosses a telegraph post in 16 seconds. The speed of the train is?
Options:
(A) 126 kmph
(B) 77 kmph
(C) 54 kmph
(D) 71 kmph
(E) 88 kmph
a: Stream of consciousness: S = 560/16 * 18/5 = 126 kmph The answer is (A).

question: The speed of a train is 90 kmph. What is the distance covered by it in 12 minutes?
Options:
(A) 15
(B) 18
(C) 77
(D) 52
(E) 42
answer: Stream of consciousness: 90 * 12/60 = 18 kmph The answer is (B).

q: Twenty percent of Country Y's yearly exports come from fruit exports. One-sixth of all fruit exports from Country Y are orange exports. If country Y generates $4 million from its orange exports, how much money does it generate from its yearly total of exports?
Options:
(A) $21.25m
(B) $25.5m
(C) $106.25m
(D) $120m
(E) $153m
a: Stream of consciousness: 2/10*1/6*(total) = 4
1/30*(total) = 4
(total) = 4*30 = 120 The answer is (D).

question: In case T, S and X are the only individuals sewing on committee B, the members of committee C should be:
Options:
(A) Z and Y
(B) Z and W
(C) Y and V
(D) Y and U
(E) Y and W
answer: Stream of consciousness: Y and U Because in committee b the individuals are S and X so in committee c the individuals will be Y and U The answer is (D).

question: A wheel rotates 20 times every minute and moves 35 cm during each rotation. How many metres does the wheel move in one hour?
Options:
(A) 6 metre
(B) 120 metre
(C) 220 metre
(D) 1200 metre
(E) 420 metre
answer:
Stream of consciousness: Number of times wheel moves in 1 hour = 20 * 60 = 1200
:. Distance moves = (1200*35) cms = 42000 cms
In metres = 420 metr The answer is (E).