A can complete 3/8 part of a work in 36 days. B can complete 1/2 part of the same work in 27 days. Which of the following statement(s) is/are correct?

I. A is less efficient than B.

II. A and B working together can complete 11/15 part of the same work in 36 days.

Only I

A = \(\frac{3}{8}\)W = 36 days = 96 days,

B = \(\frac{1}{2}\)W = 27 days = 54 days,

⇒ Efficiency of A is less than B, therefore Part I is true.

⇒ A + B working for 36 days = (9 + 16) x 36 = 25 x 36 = 900 ≠ \(\frac{11}{15}\) of 864,

⇒ Therefore, Only part I is true.