Sonu alone can make a table in 125 days while Monu alone can make it in 250 days. Monu started the work and worked for 75 days. In how many days Sonu can finish the remaining work?

Sonu can make a table in 125 days, Monu in 250 days. Monu worked for 75 days.
Formula Used:

Work done = Rate × Time
Solution:
Rate of Sonu = $$\frac{1}{125}$$​ table/day.
Rate of Monu = $$\frac{1}{250}$$​ table/day.
Work done by Monu = Rate × Time = $$\frac{1}{250}$$​ × 75 = $$\frac{3}{10}$$​ table.
Remaining work = $$1 -\frac{ 3}{10}$$​ = $$\frac{7}{10}$$​ table.
Time taken by Sonu to finish the remaining work = $$\frac{Work} { Rate}$$​ = $$\frac{7/10} { 1/125}$$​ = 87.5 days.