SSC Government Jobs Exams Numerical Ability Alligation or Mixture

A goldsmith observes that one of his employee prepares a necklace in 9 hours, while another employee prepares it in 10 hours. if they work together they studd 10 gems less every hour and thus prepare a necklace in 5 hours, then the number of gems studded in each necklace is: a) 800 b) 900 c) 1200 d)1000

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SSC Other Question

16 workers working 6 hours a day can build a wall of length 150 mts breadth 20 m and height 12 m in 25 days IN how many days 12 workers working 8 hours a day can build a wall of length 800m breadthy 15m and height 6m a vessel contains 120 litres of juice. 20% of the juice is taken out and the same is repeated two more times. Water of the amount equal to the juice taken out is mixed with the remaining juice in the vessel. what is the ratio of the juice and water in the vessel?