maths
posted by Anonymous .
A and B together can do a piece of work in 12 days; B and C together can do it in 15 days. If A is twice as good a workman as C, in how many days A alone will do the same work?

Wow! Seven posts in four minutes! And under different names!!
Riddhi kersharwani, Anonymous, manpreet, and faizel ... there's no need to keep switching names. 
Thanks for the alert, Writeacher. Please advise if he/she keeps showing up with new names. I've had enough

Will do.

@ Writeacher, and drwls
If i want the help of experts , i don't need to change my name..
my name is always Anonymous..
i don't know why r u comparing me with Riddhi kersharwani, Anonymous, manpreet, and faizel ... all that.. 
What rubbish! All posts are coming from the same computer! Your IP address tells me so.

could it be a lab computer, used by many students?

yes, steve..thank u for understanding me..

The second "Anonymous" is not posting from the same IP address as the multiplename one.

sounds like there's a line of students waiting to post their questions on Jiskha. Maybe they should get together and help each other!

now, plse answer my question...
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