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We look for a function whose derivative is cos 2x. We know that; d/dx (sin 2x) = 2 cos 2x or cos 2x = 1/2 d/dx (sin 2x) = d/dx (1/2 sin 2x) Therefore, an anti-derivative of cos 2x is 1/2 sin 2x.
Pipe T can empty a completely filled tank in 50 hours. Pipe R and T together can fill an empty tank completely in (z+5) hours. The efficiency of pipe R ...
Pipe ‘A’ can fill a 210-litre tank in 21 hours. If pipe ‘A’ is 25% more efficient than pipe ‘C’ whereas pipe ‘B’ is 50% more efficient t...
Pipe ‘A’ can fill a tank in 20 hours while pipe ‘B’ takes 40 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 1...
Pipe ‘A’ and pipe ‘B’, together can fill 32% of a tank in 8 hours while pipe ‘C’ takes 35 hours to empty it. ...
Pipes A and B can fill an empty tank in 20 hours and 24 hours, respectively, while pipe C can drain the full tank in "x" hours. If all three pipes (A, B...
A tank has two pipes, Pipe A and Pipe B. Pipe A fills the tank in 10 hours, while Pipe B fills it in 15 hours. Pipe C can empty the tank in 30 hours. If...
Pipe A and Pipe B together can fill the tank in 10 hours. The capacity of the pipe A is 30% of the capacity of the pipe B. How much time will pipe B alo...
Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 6 hours while pipe ‘C’ takes 36 hours to empty it. ...
The efficiency of inlet pipe 'P' is 60% of the efficiency of another inlet pipe 'Q'. When both pipes are opened together, they fill a tank in 4 hours. H...
A tank can be filled by a tap in 10 minutes and by another tap in 30 minutes. Both the taps are kept open for 5 minutes and then the first tap is shut o...
