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A particle P moves in a straight line so that its displacement, s m, from a fixed point O , t seconds after passing through point A one the line , is given by s =t^2-3t^2-9t+30...

a man takes 24 days to do a piece of work while woman takes 72 days to do same work . if a contractor engages men and women to do the same work in 4 days .then how many members does the contractor...

james and ghansu can do a piece of work in 9 days by working together . their skills of doing work are in the ratio 3:5 in how many days will take to complete the work if he is engaged alone....

3 men or 8 women can paint 4 houses in 9 days . a builder hires men and women to paint 6 houses in 3 days .then members does the builder need.   (a)15 (b)16 (c)18 (d)26...

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