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Let the capacity of the cistern = 60 units Then, efficiency of pipe ‘A’ = 60/20 = 3 units/minute Efficiency of pipe ‘B’ = 60/12 = 5 units/minute Efficiency of pipe ‘C’ = 60/10 = 6 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 3 + 5 – 6 = 2 units/minute 50% of the cistern’s capacity = 30 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 30/2 = 15 minutes
Which of the following nutrient element is immobile in soil but mobile in plants ?
Soil microorganisms are most active at which temperature range?
Which of the following statements accurately describes parasitism in biotic interactions?
Homestead agroforestry is a sustainable land-use system that integrates trees, crops, and livestock within the same plot of land around a homestead or h...
Water movement in a saturated soil is governed by
The bacterium responsible for nitrogen fixation in leguminous crops is:
Phenol on distilling with zinc dust gives:
Which of the following techniques is employed to determine the nutrient status of a standing crop and involves collection and analysis of plant tissues?
Katte disease of cardamom is transmitted by which insect?
Which among the following herbicides is non-selective herbicide?