Question

Mr.P and Mr.Q can build a wall in 10 days; Mr. & Mr.R can take 14 days to build the same wall; and Mr.P and Mr.R can do it in 8
days. Who among them will take more time when they work alone?​

Answer 1

Step-by-step explanation:

assuming the total work be 280 units. 

Now P and Q capacity per day = 280/10 = 28 units.

Q and R capacity per day =280/14 = 20 units.

P and R capacity per day = 280/8 = 25 units. 

Adding all the three,

2(P + Q + R) = 73 ➡️ P + Q + R = 36.5 units. 

We have to find who will take maximum time.

So,

the capacity is minimum.  R capacity is minimum as (P + Q + R) - (P + R) = ↙️

✅36.5 - 28 = 8.5. ✔