4. The stage is in the shape of a semi-circle and a rectangle, as shown below. All area is to
painted. 1 liter of paint is needed to paint 5m? How many liters of paint is needed?
2 m
2 m
4 m
Answers
Given :- The stage is in the shape of a semi-circle and a rectangle, as shown below. All area is to painted. 1 liter of paint is needed to paint 5m? How many liters of paint is needed ?
Answer :-
→ Total area = Area of semi - circle + Area of rectangle = (π *3²)/2 + 10 * 4 = 4.5π + 40 = 14.13 + 40 = 54.13 m² .
so,
→ for 5m² paint needed = 1 litre
→ for 1m² paint needed = (1/5) litre
then,
→ for 54.13 m² paint needed = (1/5) * 54.13 ≈ 10.8 litre .
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