JAMB - Mathematics (2015 - No. 46)
The area of a circle of radius 4cm is equal to (Take π = 3.142 )
10.3cm2
15.7cm2
50.3cm2
17.4cm2
설명
Area of a circle (A) = πr2
Radius = 4cm
π = 3.142
A = 3.142 × (4)2
= 3.142 × 16
= 50.272
A = 50.3cm2 (1dp)
Radius = 4cm
π = 3.142
A = 3.142 × (4)2
= 3.142 × 16
= 50.272
A = 50.3cm2 (1dp)