Latest Infosys Aptitude Question SOLUTION: A spider spins a web such that each day he spins exactly the same amount as it had spun until the previous day and finishes the web in 30 days.If two spiders work in the same man

• Placement Papers
• /
• Infosys

Infosys Question Papers: Infosys Interview Experience(10) INFOSYS Company Profile

(#M40000786) INFOSYS question Keep an EYE

A spider spins a web such that each day he spins exactly the same amount
as it had spun until the previous day and finishes the web in 30 days.If two
spiders work in the same manner how many days will they take?

Asked In Infosys Yashar (13 years ago)

Unsolved Read Solution (3)

Is this Puzzle helpful?   (0)   (1) Submit Your Solution

Read Solution (3) :

KALPANA G  (13 years ago)

Take work as 'x'.
See the table given here,
day :1 2 3 4 5 ......28 29 30
work finished by one spider :x x 2x 4x 8x......(p/4)x (p/2)x (p)x
work finished by two spiders:2x 2x 4x 8x 16x......(p/2)x (p)x -

Where (p)x is Total work.

Therefore 2 spiders can complete the work in 29 days.

Is this solution Helpfull? Yes (3) | No (1)  

amrit raj  (13 years ago)

any fool will guess the answer as 15 days.......
bt the right ans will be 29 days.......

the solution goes like this....if only one spider is spinning...on the 29th day...it will finish half of its work....got this????

now if 2 spiders are spinnining on the 28th day they will finish half of their work...
so the correct ans will be....29 days

Is this solution Helpfull? Yes (1) | No   

suchandra raavi  (13 years ago)

Time and work. 30 days for 1 spider. So 15 days for 2.

Is this solution Helpfull? Yes | No (5)  

Please Login to Read Solution.