Question

Renu is walking along a park with constant velocity .The length and the breadth of the park is 7m and 5m respectively . Find the displacement after 2.5 rounds​

Answer 1

Given:

Renu is walking along a park with constant velocity .The length and the breadth of the park is 7m and 5m respectively.

To find:

Displacement after 2.5 rounds?

Calculation:

• Let's assume that Renu started from a particular vertex of the rectangle.

• After 2 complete rounds, Renu will reach back to her starting point.

• In the next 1/2 or 0.5 rounds, she will reach the diametrically opposite vertex of the rectangle.

So, the displacement (being shortest length between starting and stopping point) will be the diagonal.

$\therefore \: d = \sqrt{ {7}^{2} + {5}^{2} }$

$\implies \: d = \sqrt{ 49 + 25}$

$\implies \: d = \sqrt{74}$

$\implies \: d = 8.6 \: m$

Answer 2

Answer:

Given:

Renu is walking along a park with constant velocity .The length and the breadth of the park is 7m and 5m respectively.

To find:

Displacement after 2.5 rounds?

Calculation:

Let's assume that Renu started from a particular vertex of the rectangle.

After 2 complete rounds, Renu will reach back to her starting point.

In the next 1/2 or 0.5 rounds, she will reach the diametrically opposite vertex of the rectangle.

So, the displacement (being shortest length between starting and stopping point) will be the diagonal.

\therefore \: d = \sqrt{ {7}^{2} + {5}^{2} }∴d=

7

2

+5

2

\implies \: d = \sqrt{ 49 + 25}⟹d=

49+25

\implies \: d = \sqrt{74}⟹d=

74

\implies \: d = 8.6 \: m⟹d=8.6m