Question

A can do a certain job in 12 days B is 60% more efficent than A how many days does B alone take to do the same job​

Answer 1

Answer:

7.5

Step-by-step explanation:

ratio of time taken by A and B =160 : 100

                                               = 8 :5

now,

8 : 5 : : 12 : x

8/5=12/x

8x = 12 (5)

x = 60/8

x=7 1/2 or 7.5