Q.5. A swimming pool is 200 m long and 120 m wide. 36 litres of water is pumped into it. Find the rise in level of water.

Length of pool, l = 200 m = 20000 cmBreadth of pool, b = 120 m = 12000 cmAmount of water = 36 l=36 × 1000 cm3=36000 cm3Now, let h be the rise in water level when 36 l of water is pumped.Amount of water in pool = 36000 cm3lbh = 3600020000 × 12000 × h = 36000h = 0.00015 cm

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