Question

find the area and circumference of a circle whose diameter is a 7.7 be 4.2 centimetres in 24.5 metre 7 km

Answer 1

D=7.7, r=d/2=7.7/2=3.85
Area of circle is πr².
22/7×(3.85)²=46.58cm²
Circumference of circle is 2πr.
2×22/7×3.85=24.2cm².