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Start learning 50% faster. Sign in now2x +3y =7 … (1) And 2x+2 -3y+2 =7 4 ×2x – 3 ×3y =7 … (2) Let, 2x =a and 3y = b Then (1) and (2) …. a + b =7 4a – 3b =7 On solving equations- a =4, b =3 now – 2x =4 =22 x =2 And 3y =3 =31 y =1. (2,1)
Tap A can fill a tank in 20 hours and tap B can emptied it is 25 hours. Tap A starts filling and they opened for 1 hour each alternatively in what time...
Two pipes A and B can fill a tank in 24 min., and 32 min, respectively. If both the pipes are opened simultaneously, after how much time B should be clo...
A tank has two inlet pipes A and B and an outlet pipe C. Pipe A can fill the tank in 6 hours, and Pipe B can fill it in 8 hours. Pipe C can empty the fu...
If a tank can be filled by a tap in 12 hours, but due to an outlet, it actually takes 6 hours longer to fill the tank, find the duration in which the ou...
Pipe X can fill a tank in 15 hours and pipe Y in 30 hours. If both the pipes are opened in an empty tank, how much time will they take to fill it?
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20 minutes and 18 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If a...
Tap A and Tap B fill a drum of volume 117 liters in 3 minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the cis...
Pipe 'C' alone takes 5 more hours to fill the tank than the time taken by pipe 'C' and pipe 'D' together. Find the approximate ti...
Two pipes, X and Y, can individually fill a tank in 50 minutes and 25 minutes respectively. If both pipes are opened simultaneously, after how much time...