A cistern is filled by Pipe A and Pipe B together in 2.4 hours. Pipe A alone can fill the cistern at the rate of 100 litres per hour. Pipe B alone can fill the cistern in 4 hours. What is the…
Question and options
A cistern is filled by Pipe A and Pipe B together in 2.4 hours. Pipe A alone can fill the cistern at the rate of 100 litres per hour. Pipe B alone can fill the cistern in 4 hours. What is the capacity of the cistern?
- 1200 litres
- 600 litres
- 1000 litres
- 500 litres
Answer and explanation
Correct answer: B - 600 litres
A + B fill per hour, B fills , so A fills per hour, i.e. 6 hours. At 100 litres/hour capacity = 600 litres.
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