Ex.2.3 Q5 fractions-and-decimals Solutions-Ncert Maths Class 7

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Question

Saili plants \(4\) saplings, in a row, in her garden. The distance between two adjacent saplings is \(\begin{align} \frac{3}{4}\rm\, m\end{align} \). Find the distance between the first and the last sapling.

Text Solution

What is known?

Number of saplings and distance between two adjacent saplings.

What is unknown?

Distance between the first and the last sapling.

Reasoning:

Add the distance of first to second, second to third and third to fourth. Since all the sapling are plant equidistance to each other then we can simply multiply \(\begin{align}\frac{3}{4}\end{align}\)by \(3\).

Steps:

Total number of saplings \(\rm= 4\)

Distance between two adjacent saplings\(\begin{align} = \frac{3}{4}{\rm{m}}\end{align} \)

Distance between the first and the last sapling\(\begin{align}= 3 \times \frac{3}{4} = \frac{9}{4}{\rm{m}} = 2\frac{1}{4}{\rm{m}}\end{align} \)

Thus, the distance between the first and last sapling is \(\begin{align} 2\frac{1}{4}{\rm{m}}\end{align} \)

  
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