exam Exam Numerical Ability Co-ordinate geometry

The minute hand of a clock overtakes the hour hand at intervals of 65minutes of the correct time .How much a day does the clock gain or lose?

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Two men,Vikas and Vishal,working separately can mow a field in 8 and 12hours respectively.If they have work in stretches of one hour respectively,Vikas beginning at 8a.m,when will the mowing be finished? A Garrison of 3300 men had provision for 32days,when given at the rate of 850gm per head.At the end of 7days,a reinforcement arrived and it was found that the provision would last 17 days more,when given at the rate of 825 gm per head.What was the strength of the reinforcement?