help guys help. if you don't know the answer please don't answer
Answers
Solution :
In the passage , the only information worthy here :
It is mentioned that one pipe can fill the pool in 12 hours and another can fill the same pool in 18 hours.
Now , both the pipes are opened at the same time .
So , work done by them in 1 hr
=> 1/12 + 1/18
=> ⅙ ( ½ + ⅓ )
=> ⅙ ( ⅚ )
=> 5/36.
Thus , the required time taken :
=> (36/5) hours
=> 7.2 hours .
The pipes are opened at 8 am .
So , the pool will be filled at - ( 8 am + 7.2 hours )
=> ( 12 pm + 3.2 hrs )
=> 3 pm + ⅕ th of an hour
=> 3:12 pm .
Thus , the pool will not be filled by 2 pm .
The pool will get filled exactly at 3:12 pm .
Yeah the situation would have been different if the pool was booked ahead of time.
The best decision to make is to schedule this to a later time on that day .
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