Geometry Formulas | MCQs

Explanation

The area of a triangle will be a=1m, b = 2m, c = 3m, a,b,c being lengths of respective sides is 3 sq m 

******

Step-by-step explanation:

S = (1 + 2 + 3)/2 = 3

Explanation

A cuboidal water tank contains. 216 l of water. Its depth is ⅓ of its length and its breadth is ½ of ⅓ of the difference between length and depth. The length of the tank is:​ 18dm

step by step explanation:

****

ND10-12-2022

Explanation

Square = 4 sides are equal

Rectangle = only 2 opposite sides are equal

In the case of 3-dimension,

If the hall is in Cube shape, the area of all 4 walls will be equal.

But, here we know that the hall is in a Rectangular Prism shape, so only the area of 2 opposite walls will be equal.

Area of two walls = 15*b + 15*b = 30b

Area of other two walls = 12*b + 12*b = 24b

Hence,

Their Sum = 30b + 24b = 54b

360 = 54b which means b = 360/54 = 20/3

Here, the breadth of the walls is equal to the height of the rectangular prism (Hall)

Hence,

Volume of Hall = l*b*h = 15*12*(20/3) = 1200 cu.m

****

ND10-12-2022