In a scale drawing for a garden, 2cm =1m. If the garden measures 8cm by 10cm in the drawing, how large will it be in reality? (answer is in meters)
In the drawing, 2cm represents 1m.
If the garden measures 8cm by 10cm in the drawing, it will measure (8/2) meters by (10/2) meters in reality.
So, the garden will measure 4 meters by 5 meters in reality. Answer: \boxed{4 \text{ meters by } 5 \text{ meters}}.