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With what I might help but there is no question

Actual measurement of bed is:

200 cm by 150 cm

Step-by-step explanation:

Elena’s bed measures 4 cm by 3 cm on the scale drawing.

The ratio of scale drawing to actual bed size is 1 to 50.

i.e. On scale drawing Length of bed=4 cm

Actual Length of bed= 4×50 cm

                                   = 200 cm

On scale drawing Width of bed=3 cm

Actual Width of bed= 3×50 cm

                                   = 150 cm

Hence, actual measurement of bed is:

200 cm by 150 cm