Nothing's wrong here. Your equation:

[{1/(T+4)} + {1/T}] = 5/24 is a simplified version of the actual equation: \(6*[{40/(T+4)}+{40/T}]=50\).

Which essentially has come from (what has been explained in above posts); i.e. In 1 minute, A can print 40/T+4 pages and B can print 40/T pages, so together in 1 min they can print

40/(T+4) + 40/T pages. Therefore, in 6 minutes, they can print

6*[{40/(T+4)}+{40/T}], which is given to be 50. When you simplify, you get the equation that you have written.

Pardon the repetitions or my lack of brevity

prasannajeet wrote:

Hi Bunuel

I may be crazy but let me understand what is wrong in the following equation and why I am not getting the right answer...

Lets rate of B=T so A=T+4

(1/T+4)+(1/T)=5/24....?????

Rgds

prasannajeet