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1. If 10 men can do a piece of work in 12 days, the time taken by 12 men to do the same piece of work will be:
10 × 12 = 12 × x
Or, x = 10 days
To understand the work equivalence method, we use a graphic as follows:
Men Days
10 ↓ 12
12 ↑ x (let)
Here, the two arrows, downward (↓) and upward (↑) show variation between men and days.
[If downward arrows show decrements then upward arrows show increments and vice-verse.]
Thus,
Solution:
Here, we use work equivalence method;10 × 12 = 12 × x
Or, x = 10 days
To understand the work equivalence method, we use a graphic as follows:
Men Days
10 ↓ 12
12 ↑ x (let)
Here, the two arrows, downward (↓) and upward (↑) show variation between men and days.
[If downward arrows show decrements then upward arrows show increments and vice-verse.]
Thus,