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Two pipes fill a 3,000-litre tank in 10 and 15 hours, and the water board bills each pipe's water at ₹ 2 per 100 litres. If both pipes fill the empty tank together, what is the bill for the second pipe's water?

Competition practicePipes & Cisterns
  • A₹60
  • B₹24
  • C₹36
  • D₹30

Step-by-Step Solution

Rates are in the ratio , so the second pipe supplies L. Bill . (₹30 splits the water equally.)
Answer: B) ₹24

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