Question

A can complete a piece of work in 12 days and B is 60% more efficient than A. In how many days B will complete the same work ?
A) 8.7 hrs
B) 5.2 hrs
C) 5 hrs
D) 7.5 hrs

Answer 1

Answer:

7.5 Days

Step-by-step explanation:

A can complete do a piece of work in = 12 Days

A's 1 day work = 1/12

B is 60 % more efficient then A

so B's 1 Day Work = A + (60/100)A

= 8A/5

= (8/5)(1/12)

= 2/15

B's 1 day work = 2/15

B will complete work in 1/(2/15) = 15/2  = 7.5 Days

Answer 2

Answer:

Step-by-step explanation:

A can complete do a piece of work in = 12 Days

A's 1 day work = 1/12

B is 60 % more efficient then A

so B's 1 Day Work = A + (60/100)A

= 8A/5

= (8/5)(1/12)

= 2/15

B's 1 day work = 2/15

B will complete work in 1/(2/15) = 15/2  = 7.5 Days