Question

How many cans of paint are needed to cover an area of 2200 square units if one can of paint covers in area 400 square units

Answer 1

Answer:

If one pain covers an area of 400 Sq. Unit, then if the area is 2200 sq. Units then how many paint cans are required.

Step-by-step explanation:

This is a very simple question…..related to basic mathematical calculations..

Now lets see we have…

Total are to be painted = 2200 sq. units.

Area covered by one paint = 400 sq. units.

So for covering an area of 2200 sq. units how many cans we need can be calculated as follows:-

Let the covered are be X.

Paint cans   area

X   2200 sq. units.

1   400 sq. units.

So, calculating for X by ratio method (cross multiply), we get

X:2200 :: 1 : 400

X / 2200 = 1 / 400

X = 2200 x 1 / 400 = 2200 / 400 = 22 / 4 = 5.5 cans.

So it is obvious that to paint 2200 sq. units of area we need around 5.5 cans (five and a half cans) of paint.

Answer 2

5.5 cans of ‘paint’ are needed to cover an area of “2200 square units”.  

Solution:

Area of square $=4 \times \text{(as the sides of a square are same)}$

= 2200 square units

One can of ‘paint covers’ 400 square units of area. Hence, if we divide the total area of square by the area covered by one can, we can get the number of cans needed to cover the area of 2200 square units.  

The same is shown as under:

= Total area of square to be painted / area of square one can paints

$=\frac{2200}{400}$

= 5.5 cans.

Hence, five and a half cans will be required to paint 2200 square units of  square.