Water flows in a tank of 150 m long and 100m wide through a pipe of rectangular cross section 25cm * 10cm at a speed of of 18 km/hour in what time the water level will be 9m
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When a drop of blue Litmus is added to the lemon juice it will turn from Blue to red colour because lemon juice contains citric acid and any acid turns blue Litmus Paper to red litmus paper
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