Maths Trick with Examples
If M1 person completes a work in D1 days, M2 persons complete it in D2 days.
M1D1 = M2D2
If time also is given, then (like 6 hours)
M1D1T1 = M2D2T2
If amount of work done is also given, then
M1D1T1W2 = M2D2T2W1
18 persons working for 8 days at 5 hours per days can cut 24 trees; then 10 persons working 4 hours per day will cut how many trees in 9 days?