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It takes 12 hours to fill a swimming poo...

It takes 12 hours to fill a swimming pool using two pipes . If the pipes of larger diameter is used for 4 hours and the pipe of smaller diameter is used for 9 hours , only half of the pool is filled. How long would it take for each pipe to fill the pool separately?

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The correct Answer is:
Larger pipe = 20 hr, smaller pipe = 30 hr
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To fill swimming pool two pipes are to be used. If the pipe of larger diameter is used for 4 hours and the pipe of smaller diameter for 9 hours, only half the pool can be filled. Find, how long it would take for each pipe to fill the pool separately, if the pipe of smaller diameter takes 10 hours more than the pipe of larger diameter to fill the pool

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6 pipes can fill a tank in 1 hour 24 minutes. How long will it take to fill the tank if 7 pipes of the same type are used?

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NAGEEN PRAKASHAN-LINEAR EQUATIONS IN TWO VARIABLES -Exercise 3e
  1. A boat travels for 7 hours. If it travels 4 hours downstream and 3 hou...

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  2. A sailor goes 8 km downstream in 40 minutes and returns in 1 hours....

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  3. Anshula walks 35 km partly at the rate 4 km/hour and Partly at 5 km/ho...

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  4. A bucket when filled (5)/(7) with water weights 12 kg and filled (3)/(...

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  5. Acids with 25% and 40% concentrations are mixed to get 60 litres of 30...

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  6. A person, invested some amount at the rate of 12% simple interest and ...

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  7. rates?43. A milkman buys 15 litres milk partly at the rate of 12 per l...

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  8. Ved travels 600 km to his home partly by train and partly by car. H...

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  9. Students of a class are preparing for a drill and are made to stand...

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  10. A part of monthly hostel charges is fixed and the remaining depends on...

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  11. The ratio of incomes of A and B is 9 : 7 and the ratio of their expend...

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  12. Mr. Mohit has decided to walk on a treadmill for a fixed distance. Fir...

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  13. It takes 12 hours to fill a swimming pool using two pipes . If the pip...

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  14. A number consists of three digits whose sum is 17. The middle one exce...

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  15. In an examination, the number of those that passed and the number of t...

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  16. Ratio between the girls one long 11 class of 40 students is 2:3 five, ...

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  17. A certain amount is charged for 1 km for a scooter fare and lesser amo...

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  18. If 3 taps are open together, a cistern is filled in 3 hrs. One of the ...

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  19. When the numerator of a fraction is increased by 4, the fraction incre...

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  20. Solve for a and b : 2^(a) + 3^(b) = 17 and 2^(a+2) - 3^(b+1) = 5

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