q: A 180 meter long train crosses a man standing on the platform in 6 sec. What is the speed of the train?
Options:
(A) 228
(B) 108
(C) 1266
(D) 188
(E) 211
a: Stream of consciousness: S = 180/6 * 18/5 = 108 kmph The answer is (B).

question: If a man can cover 12 metres in one second, how many kilometres can he cover in 3 hours 45 minutes?
Options:
(A) 228
(B) 162
(C) 5528
(D) 256
(E) 191
answer: Stream of consciousness: 12 m/s = 12 * 18/5 kmph
3 hours 45 minutes = 3 3/4 hours = 15/4 hours
Distance = speed * time = 12 * 18/5 * 15/4 km = 162 km. The answer is (B).

q: The flow of water through a drainage pipe was monitored for a 3-hour period. In the second hour, the rate of flow was 24 gallons per hour, which was 50 percent faster than the rate of flow for the first hour. If 25 percent more water flowed through the pipe in the third hour than it did in the second, how many gallons of water flowed through the pipe during the entire three hours?
Options:
(A) 61.25
(B) 62.5
(C) 63.75
(D) 70.0
(E) 77.5
a: Stream of consciousness: Rate of flow of water in second hour = 24 gallons per hour
Rate of flow of water in first hour = 24/(3/2) = 16 gallons per hour
Rate of flow of water in third hour = (125/100)* 24 = (5/4) * 24 = 30 gallons per hour
Number of gallons of water that flowed through the pipe during the entire 3 hours = 16+24+30 = 70 gallons The answer is (D).

question: The average age of a family of 6 members is 24 years.If the age of the youngest member is 8 years,what was the average age of the family at the birth of the youngest member?
Options:
(A) 15
(B) 16
(C) 21
(D) 12
(E) 19
answer: Stream of consciousness: Present age of total members = 6 X 24 = 144
8 yrs back their ages were = 6 x 8 = 48
Ages at the birth of youngest member = 144 - 48 = 96
Therefore, avg age at the birth of youngest member = 96/6 = 16. The answer is (B).

q: The floor of a rectangular room is 19 m long and 12 m wide. The room is surrounded by a veranda of width 2 m on all its sides. The area of the veranda is :
Options:
(A) 144 m2
(B) 140 m2
(C) 108 m2
(D) 158 m2
(E) None of these
a: Stream of consciousness: Area of the outer rectangle = 23 16 = 368 m2
Area of the inner rectangle = 19 12 = 228 m2
Required area = (368 228) = 140 m2 The answer is (B).

q: A 600 meter long train crosses a signal post in 30 seconds. How long will it take to cross a 3 kilometer long bridge, at the same speed?
Options:
(A) 4 min
(B) 2 min
(C) 8 min
(D) 3 min
(E) 5 min
a:
Stream of consciousness: S = 600/30 = 20 mps
S = 3600/20 = 180 sec = 4 min The answer is (D).