Question

What is the length of the longest line that can be
drawn on A4 size paper 30 cm by 21 cm?​

Answer 1

Answer:

It will be the hypotenuse i.e.

Longest line = under root 30²+21²

= 36.62 cm...

Hope it helps...

Follow me

This is Pythagoras Theorem.....

Answer 2

Answer:

36.6 cm (apprx.)

Step-by-step explanation:

The longest line in a rectangle (A4 size paper) is the diagonal.

Given,

Length = 30 cm

Breadth = 21 cm

To find diagonal, we will use Pythagoras' Theorem:

${length}^{2} + {breadth}^{2} = {diagonal}^{2} \\ = > {30}^{2} + {21}^{2} = {d}^{2} \\ = > 900 + 441 = {d}^{2} \\ = > 1341 = {d}^{2} \\ = > d = \sqrt{1341} \\ = 36.61 = 36.6 \: cm \: (approx.)$

Thanks!!

Please mark brainliest and follow me...