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water is being pumped to empty a swimming pool.
At 6 a.m , the water level is 150 cm . Every 2 hours , the water level drops by 30 cm. what is the earliest time when the pool will be empt ??
to empty the pool, you need to lower the water level by 150cm. since you can only lower it by 30cm every 2 hours (also same as 15 cm per hour), that means it will take you 10 hours.
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