Correct Answer - Option 4 : 10 hours
Given:
The Ruchi can write a book = 22 days
The Ruchi working = 5 hours per day
Formula used:
\({H_1\ × D_1\ × M_1 \over W_1}\ =\ {H_2\ × D_2\ × M_2\over W_2}\) (Where H = The hours, D = The days, M = The number of men and W = The work)
Calculation:
Let us assume he will work for X hours per day to complete the work in 11 days
⇒ 5 × 22 = X × 11
⇒ The Ruchi will work each day = X = 10 hours
∴ The required result will be 10 hours.
Work = Efficiency × Time
