Ex.2.3 Q6 fractions-and-decimals Solutions-Ncert Maths Class 7

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Question

Lipika reads a book for \(\begin{align} 1\frac{3}{4}\end{align} \) hour every day. She reads the entire book in \(6\) days. How many hours in all were required by her to read the book?

Text Solution

What is known?

Lipika reads for \(\begin{align}1\frac{3}{4}\end{align}\)hours every day and read the entire book in \(6\) days.

What is unknown?

Total hours required by her to complete the book.

Reasoning:

In a day she reads for \(\begin{align}1\frac{3}{4}\end{align}\) hours so for calculating \(6\) days we can simply multiply \(\begin{align}1\frac{3}{4}\end{align}\) hours by \(6\).

Steps:

\[\begin{align} \text{No. of hours taken by Lipika to read a book everyday}=1\frac{3}{4}{\rm{ hour }} = \frac{7}{4}\end{align} \]

No. of days taken to read the entire book \(= 6 \rm \,days\)

\[\begin{align} \text{Total no. of hours required by her to read the book}= \frac{7}{4} \times 6 = \frac{{42}}{4}{\rm\,{ hours }} = 10\frac{1}{2}\end{align} \]

Thus, \(\begin{align} 10\frac{1}{2}\end{align} \) hours in all were required by Lipika to read the book.

  
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