Question

dear sir. plz explain the both question's. urgent​

Answer 1

side of tile are:20and40cm or 0.2 and 0.4 m

area of tiles=0.2×0.4=0.08m^2

area of floor=16×9=144

total tiles=144/0.08=1800 tiles

area of square=side^2

22050=side^2....(1)

and in traingle :side^2+side^2=diagonal^2

therefore 22050+22050=44100

diagonal=210

Hope it helps......

Answer 2

1st Answer :

Given :

Measurements of the tile

Length = 20cm = 0.2 meters

breadth = 40cm = 0.4 meters

Measurements of the floor

Length = 16 meters

Breadth = 9 meters

Required to find :

1. Number of tiles required

Solution :

The formula used for the conversion of centimetres into meters.

$1 \: centimeter \: = \frac{1}{100} meters$

Now , Let's solve this question ;

In the question it is given that;

Measurements of the floor

Length = 16 meters

Breadth = 9 meters

Hence, The shape of the floor is rectangle .

So,

Area of the floor = length × breadth

==> 16 meters × 9 meters

==> 144 meter^2

Now ,

Let's consider ;

Measurements of the tile

Length = 0.2 meters

breadth = 0.4 meters

Hence ,

The tile is in the shape of an rectangle.

So;

Area of the tile = length × breadth

==> 0.2 meters × 0.4 meters

==> 0.08 meter^2

Therefore;

No. of tiles will be required = Area of the floor / Area of a single tile

Hence ,

No. of tiles required = 144 / 0.08

===> 1,800 tiles .

Conclusion :

Hence , Option - C is correct

$\rule{400}{4}$

$\rule{200}{2}$

2nd Answer :

Given :

Area of the square = 22050 sq. cm

Required to find :

1. Length of the diagonal

Solution :

In the question it is given that ;

Area of the square = 22050 sq. cm

Now we have to find the measurement of the side in order to find the length of Diagonal.

So, let the length of the side be " x " cm

Area of the square = side × side

$x \times x = 22050 \\ {x}^{2} = 22050 \\ x = \sqrt{22050} \\ x = 148.5 \: cm$

Hence ,

Length of the side = 148.5 cm .

Now we have to use a small trick to find the length of the diagonal.

The trick is ;

$(side {)}^{2} + (side {)}^{2} = (diagonal {)}^{2}$

Using this above mentioned trick we can find the answer.

Let's substitute the values in it .

$(148.5 {)}^{2} + (148.5 {)}^{2} = (diagonal {)}^{2} \\ \\ 22052.25 + 22052.25 = (diagonal {)}^{2} \\ \\ 44104.5 = (diagonal {)}^{2} \\ \\ (diagonal {)}^{2} = 44104.5 \\ \\ diagonal = \sqrt{44104.5} \\ \\ diagonal = 210.0107 \\ \\ diagonal = 210(approximately)$

Therefore,

Length of the diagonal = 210 cm

Conclusion

Hence , Correct option - d