Calculate the area of a sector of a circle with radius 10 metres and angle of 90 defrees at the centre.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 78.5 m2
Formula used:
Area of sector = (Angle made by the sector/360) × πr2 ---- (1)
Calculations:
Using equation (1), we get
⇒ Area of sector = (90/360) × 22/7 × 10 × 10
⇒ Area of sector = 78.5 m2