One man, 3 women and 4 boy can do a piece of work in 96 hours, 2 men and 8 boys can do it in 80 hours, 2 men and 3 women can do it in 120 Hours, then 5 men and 12 boys can do it in ??
please anyone provide me direct formula or any short tricks for this math .
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let no. of hours taken by 5 men and 12 boys be x
total no. of people in 4th case= 5+12
=17
no. of people in 3rd case = 2+3
=5
no. of people(p) 5 , 17
no. of hours(q) 120 , x
more the no. of people, less the time taken, hence P and q vary inversely
p×q=5×120=17×x
600=17x
600/17=x
35.29=x
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