The length of the rectangular bed is 5 m and the width is 20 dm. The bed was lengthened by 1 m.

The length of the rectangular bed is 5 m and the width is 20 dm. The bed was lengthened by 1 m. What is the area of the bed?

To solve this problem, we will bring the units of measurement to a common value – meters.
Then, the width of the rectangular bed will be 20/10 = 2 meters (ten decimeters in one meter).
If the length of the rectangular bed is increased by 1 meter, then its length will become equal to 6 meters (5 + 1 = 6).
To find the area of a rectangular bed, you need to multiply its length by its width.
As a result, we get the area of a rectangular bed equal to 6 x 2 = 12 square meters.
Answer: the area of a rectangular bed is 12 square meters.