Question

18 men bind 900 books in 10 days. Find how many binders will be required
to bind 600 books in 12 days?
2 Draw a pie-chart for the following data of monthly expenditure of a family​

Answer 1

Answer:

Given: 18 binders bind 900 books in 10 days.

To find: Number of binders that will be required to bind 660 books in 12 days.

Formula : W_1M_2D_2=W_2M_1D_1W

1

M

2

D

2

=W

2

M

1

D

1

, where W = Work, M = Number of men, D= Days .

Put

\begin{gathered}W_1=900\ , M_1=18\ , D_1=10\\ W_2=660\ , D_2=12\end{gathered}

W

1

=900 ,M

1

=18 ,D

1

=10

W

2

=660 ,D

2

=12

we will find M_2M

2

\begin{gathered}(900)\times M_2\times (12)=(660)\times(18)\times(10)\\\\\Rightarrow\ M_2=\dfrac{(660)\times(18)\times(10)}{(900)\times12}=11\end{gathered}

(900)×M

2

×(12)=(660)×(18)×(10)

⇒ M

2

=

(900)×12

(660)×(18)×(10)

=11

Hence, 11 binders that will be required to bind 660 books in 12 days.