Question

Suman reads a book for 2 1/3 hours every day. She reads the entire book in 9 days. How many hours in all were required by her to read the book?​

Answer 1

Answer:

21 h

Step-by-step explanation:

2 1/3x9

=7/3x9

=7/1x3

=21 h

Answer 2

Answer :

• 21 hours

Given :

• Suman reads a book 2 1/3 hours every day.
• She reads the entire book in 9 days.

To find :

• many hours in all were required by her to read the book?​

Solution :

⇒ Let's find in how many hours in all were required by her to read the book.

$\sf \longrightarrow 2 \dfrac{1}{3}$

$\sf \longrightarrow \dfrac{3 \times 2 + 1}{3}$

$\sf \longrightarrow \dfrac{6 + 1}{3}$

$\sf \longrightarrow \dfrac{7}{3}$

$\sf \longrightarrow \dfrac{7}{3} \: hours$

$\sf \longrightarrow 9\: days = \dfrac{7}{3} \: \times 9$

$\sf \longrightarrow \dfrac{7}{3} \: \times \dfrac{9}{1}$

$\sf \longrightarrow \dfrac{7 \times 9}{3 \times 1}$

$\sf \longrightarrow \dfrac{63}{3}$

$\sf \longrightarrow \cancel{ \dfrac{63}{3} }$

$\sf \longrightarrow 21$

• Therefore, Suman needs 21 hours to read the book.