Question

In the question, two Quantities I and II are given. You have to solve both the Quantity to establish the correct relation between Quantity-I and Quantity-II and choose the correct option. Rohan is twice as efficient as Sohan whose efficiency is one-fifth of the efficiency of Mohan. If all of them work together, then the work gets complete in 21 days. Quantity-I: What is the time taken by Rohan and Mohan to complete the work if both of them work on alternate days starting with Rohan? Quantity-II: What is the time taken by Sohan and Mohan to complete the work together?

Q: Answer-In the question, two Quantities I and II are given. You have to solve both the Quantity to establish...

Let the efficiency of Mohan be 5e unitsday. Efficiency of Sohan 15 X 5e e unitday Efficiency of Rohan 2 X 1e 2e unitsday Total work 2e e 5e X 21 168e units Quantity I Work done by Rohan and Mohan in first 2 days 2e 5e 7e units Time taken by them to complete the work 168e7e X 2 48 days So, Quantity I 48 days Quantity II Time taken by Sohan and Mohan to complete the work 168e e 5e 28 days So, Quantity II 28 days Therefore, Quantity-I Quantity-II Hence, option a.