Question

The length, breadth and height of a room are 2.5m, 1.5 m and 1.2m. Then the length
of its diagonal is
2) 2.4
3) 4.6
4) 3.15
1) 6.8
​

Answer 1

Answer:

4) 3.15

Step-by-step explanation:

by formula, diagonal of cuboid √l^2+b^2+h^2

Answer 2

Answer:

$\large\boxed{\sf{(4)\:3.15\:m}}$

Step-by-step explanation:

Given dimension of cuboid

• Length, l = 2.5 m
• Breadth, b = 1.5 m
• Height, h = 1.2 m

To find the length of it's diagonal.

We know that, length of diagonal,(d) of a cuboid having dimension l, b and h is given by,

$\large \red{\sqrt{ {l}^{2} + {b}^{2} + {h}^{2} } }$

Therefore, we will get

$= > d = \sqrt{ {(2.5)}^{2} + {(1.5) }^{2} + {(1.2)}^{2} } \\ \\ = > d = \sqrt{6.25 + 2.25 + 1.44} \\ \\ = > d = \sqrt{9.94} \\ \\ = > d = 3.15$

Hence, option (4) 3.15 m is Correct.