Question

please answer this both question ​

Answer 1

Answer:

Q10. 10cm

Q11. 18 cm²

Step-by-step explanation:

Q10. Rectangle:

length = 25cm; breadth = 4cm

area ⇒ 25 × 4 = 100 cm²

For square, area is same

So, side² = 100

Thus, length of side of square ⇒ √100 = 10 cm

Q11. Length of rectangle = 2 × breadth of rectangle

perimeter ⇒ 2(length + breadth) = 18 cm

perimeter ⇒ 2(3×breadth) = 18 cm

thus, breadth = 3 cm; and length = 6 cm

area = 3 × 6 = 18 cm²

Answer 2

Answer:

(Q10) 10 cm

(Q11) 18 cm²

Step-by-step explanation:

Q10. Area of rectangle = length × breadth

= 25cm × 4cm

= 100 cm²

Area of square = 100 cm²

Side of square = y

y × y = 100

y² = 100

y = √100

y = 10

Hence, the side of the square is 10 cm.

Q11. Breadth = y

Length = 2y

Perimeter = 18 cm

2 (2y + y) = 18

2 × 3y = 18

3y = 18/2

3y = 9

y = 9/3

y = 3

Breadth = 3 cm

Length = 6 cm

Area = length × breadth

= (3 × 6) cm²

= 18 cm²

Hence,  the area of rectangle is 18 cm²