Question

If the arm of a class is reduced by 30%, then how many% decrease in the letter
Will it be?​

Answer 1

Question :

If the arm of a class is reduced by 30%, then how many% decrease in the letter

Will it be?

Solution :

Let each side of the square be = 10 unit

∴ Area of square = Side × Side

= 10 unit × 10 unit = 100 sq.unit

The resulting square arm is reduced by 30% in the side of the square.

= ( 10 - 10 of 30 ℅ ) unit

= 10 - 10 × 30/100 = 10 -3 = 7 unit

∴ Area of the resulting square

= side × side

= ( 7 unit )^2 = 49 sq.unit

Area reduction = ( 100 - 49 ) sq.unit

= 51 sq.unit, That is 51%, Answer

Answer 2

Answer:

Solution :

Let each side of the square be = 10 unit

∴ Area of square = Side × Side

= 10 unit × 10 unit = 100 sq.unit

The resulting square arm is reduced by 30% in the side of the square.

= ( 10 - 10 of 30 ℅ ) unit

= 10 - 10 × 30/100 = 10 -3 = 7 unit

∴ Area of the resulting square

= side × side

= ( 7 unit )^2 = 49 sq.unit

Area reduction = ( 100 - 49 ) sq.unit

= 51 sq.unit, That is 51%, Answer.

Step-by-step explanation:

@Genius