Question

Priya can do a work in 16 days. In how many days will the work be completed by Sai, if the efficiency of Sai is 60% more than that of Priya ?
A) 8 days
B) 12 days
C) 14 days
D) 10 days

Answer 1

Answer:   D) 10 days

Explanation:
Ratio of efficiencies of Priya and Sai is
Sai : Priya = 160 : 100 = 8 : 5
Given Priya completes the work in 16 days
Let number of days Sai completes the work be 'd'
=> 5×16 = 8×d
d = 10 days.
Therefore, number of days Sai completes the work is 10 days.

Answer 2

Ratio of time taken by Priya & Sai =160 : 100

$\frac{160}{100} = 8 : 5$

Given Oriya completes her work in 16 days

So
Let Sai complete his work =5x16=8xd

Therefore

d=10 days