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6 years, 7 months ago
5 years, 2 months ago
Let's start with the basic formula that can be applied here
Total Work = Men x Days
M1D1 = M2D2
Now,
Total Work = 75 x 48 = (55 x 48 x 2/3) + (20 x (48 + n) x 1/3)
On solving we get,
n = 228
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