Aman , Amit and Ajay together finish a certain work in 4 days . If Aman alone can finish it in 8 days and Amit can finish it in 20 days , find how long will Ajay take to finish the work alone ?
+180 So if Aman can finish the "work" in 8 days, then in 4 days he can finish the \(\frac{1}{2}\)of the work. And since Amit can finish it in 20 days, in 4 days\(\frac{1}{5}\)of the work. 1/2 + 1/5 = 7/10. 10/10 - 7/10 = 3/10. Then that means in 4 days Ajay can finish 3/10 of the work. Which means that Ajay can finish it in 4/3 x 10 = 40/3 days.
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