Question 30
Mensuration of Plane ShapesA rectangular board has length 15 cm and width x cm. If its sides are doubled, find its new area.
- A.60x cm2
- B.45x cm2
- C.30x cm2
- D.15x cm2
Show the answer and explanation
Answer: A (60x cm2)
Explanation
The new sides are 30 cm and 2x cm, so the area is 30 × 2x = 60x cm2.