Question

pls help me in this i will give 10 points and mark him brainliest ​answer them all

Answer 1

Answer:

20) a) 4 times the previous area

b) 1/4 times the previous area

21) 24,00,000 tiles

Step-by-step explanation:

20) Let the side of the square be x.

Then, area of square= a^2 => x^2 (putting the value of a to x)

(a) If the side is doubled, i.e., 2x

then the area is (2x)^2

=> 4x^2

=> Hence the area of the new side will be 4 × x^2

=> 4 times the previous area

(b) If the side is halfed, i.e., 1/2x

then the area is (1/2x)^2

=> 1/4x^2

=> Hence the area of new side will be 1/4 × x^2

=> 1/4 times the previous area

22) Area of Tiles => L × B => 12× 10= 12cm²

Area of the Lane

=> 240× 12 = 2880²

=> 2880 × 10000

=> 28800000 cm²

No. of Tiles required = Area of Lane / Area of Tiles

=> 28800000 / 12

=> 24,00,000 tiles ...

HOPE IT HELPS...BUDDY!