Find the area of a rectangle if one of its sides is exactly 25 cm, and about the other it is known that it is: a) 7 cm less b) 2 times more

and)
Given:
Length – 25 cm
Width -? cm, 7 cm less (than the length, show with an arrow)

To find:
S of rectangle -? cm (square)

Decision:
25 cm – 7cm = 18 (cm) – rectangle width
S rectangle = a * b
S rectangle = 25cm * 18cm
S rectangle = 450 (cm (square)
Answer: The area of ​​a rectangle is 450 square centimeters.

b)
Given:
Length – 25 cm
Width -? cm, 2 times more (than length, show by arrow)

To find:
S of rectangle -? cm (square)

Decision:
25 cm * 2 = 50 (cm) – the width of the rectangle
S rectangle = a * b
S rectangle = 25cm * 50cm
S rectangle = 1250 (cm (square)
Answer: The area of ​​a rectangle is 1250 square centimeters.