
By: annielim15 (offline) Saturday, October 23 2010 @ 12:35 PM CDT (Read 2081 times)



annielim15 
Hi, could anyone pls help with this question :
Ali was given 0.18 litres of cough mixture by the doctor. He had to take 10ml of it every 4 hours. How many days would he take to finish the cough mixture?
May I know why is the answer 2 5/6 days and not 3 days.
Thank you for your help.

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Registered: 03/21/10 Posts: 1





By: arifahmad (offline) Wednesday, November 03 2010 @ 11:11 AM CDT



arifahmad 

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Registered: 11/03/10 Posts: 1





By: tedsoh (offline) Monday, January 31 2011 @ 01:29 AM CST



tedsoh 
Hi,
I think i figure out the trick of the question.
When Ali received the medicine, he would have to take the first dose.
That means that he would need to take 7 doses for the first day and 6 doses for the second and so on.
Therefore No. of doses = (180ml / 10ml )  1 = 17
No. of hours = 17 * 4 = 68 hours
68hours / 24hours(Per day) = 2 5/6

Newbie
Registered: 12/31/06 Posts: 8



