## Solution
S = 240/6 * 18/5 = 144 kmph
## What the question and answer could be
A 240 meter long train crosses a man standing on the platform in 6 sec. What is the speed of the train?
Options:
(A) 229
(B) 144
(C) 278
(D) 126
(E) 112
(B)

## Solution
Present age of total members = 6 X 22 = 132
7 yrs back their ages were = 6 x 7 = 42
Ages at the birth of youngest member = 132 - 42 = 90
Therefore, avg age at the birth of youngest member = 90/6 = 15.
## What the question and answer could be
The average age of a family of 6 members is 22 years.If the age of the youngest member is 7 years,what was the average age of the family at the birth of the youngest member?
Options:
(A) 15
(B) 18
(C) 21
(D) 12
(E) 19
(A)

## Solution
90000 + 5010 = 87050 + ?
90000 + 5010 – 87050 = 7960
## What the question and answer could be
What should come in place of the question mark (?) in the following equation?
90000 + 5010 = 87050 + ?
Options:
(A) 7960
(B) 7554
(C) 8465
(D) 4578
(E) 4689
(A)

## Solution
D = 540 + 180 = 720
S = 54 * 5/18 = 15 mps
T = 720/15 = 48 se
## What the question and answer could be

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A train 540 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 180 meters long is?
Options:
(A) 287 sec
(B) 288 sec
(C) 48 sec
(D) 16 sec
(E) 17 sec
(C)