Respuesta :

monica1668

Answer:

r=7.76cm

Step-by-step explanation:

A=2πr²

378=2×3.14×r²

378=6.28×r²

378=6.28r²

divide both side by 6.28

r²= 60.191082802547

square root b/s

r=7.75829123 to 2 d.p

r=7.76

Hope this helps