CAT 2021 Quant Question [Slot 1] with Solution 04

Option: 4
Solution:
Let the total amount of work be 60 units. Then Anu, Vinu, and Manu do 4, 5, and 3 units of work per day respectively. On the 1st day, Anu and Vinu work. Work done on the 1st day = 9 units On the 2nd day, Manu and Vinu work. Work done on the 2nd day = 8 units This cycle goes on. And in 6 days, the work completed is 9+8+9+8+9+8 = 51 units. On the 7th day, again Anu and Vinu work and complete the remaining 9 units of work. Thus, the number of days taken is 7 days.

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