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A canal is 300 cm wide and 120 cm deep. The water in the canal is flowing with a speedof 20 km/h. How much area will it irrigate in 20 minutes if 8 cm of standing water isdesired?INCERT EXEMPLARI |
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Answer» Width 300cm=3mdepth 120cm=1.2mspeed of canal 20km/h20×1000m/hvol. of water flow in 1 hour = width of canal ×depth of canal ×speef of canal water 3×1.2×20×1000=72000m3in 20 in vol. of water flows = 72000×20÷60=24000m3area irrigated in 20 min 2400÷0.08=300000m230 hectare |
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