15 persons can fill 35 boxes in 7 days. How many persons are required to fill 65 boxes in 5 days?

Correct option is D

Given:

15 persons can fill 35 boxes in 7 days. 

Concept used:

$$\frac{M_2 D_2 H_2}{W_2}=$$​​​$$\frac{M_1 D_1 H_1}{W_1}$$ 

Solution:

Let,s The number of person be - x

​$$\frac{15 \times 7 \times 1}{35} = \frac{x \times 5 \times 1}{65}$$

x = 3 $$\times$$ 13 = 39

​39 persons are required to fill 65 boxes in 5 days
Thus, correct answer is (d) 39