Maths Maths Puzzle Numerical Ability Profit and Loss

For producing 8 tables material worth Rs. 4000 were required. Labour charges were 2400. What should be the sales (S.P.) of each table to realize a profit of 25%?

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Maths Other Question

Roger gets on the elevator at the 41st floor of a skyscraper and rides up at the rate of 42 floors per minute. At the same time, Edward gets on an elevator at the 81st floor of the same skyscraper and rides down at the rate of 78 floors per minute. If they continue travelling at these rates, then at which floor will their paths cross?