Question

Lp bola yg berdiameter 21 cm dengan pi/ 22per7 adalah..
pake cara yaa

Answer 1

R = 10,5

L = 4πr²
   = 4 * (22/7) * 10,5²
   = 1386 cm²

Answer 2

Lp = 4πr²
    = 4.22/7.10,5.10,5
    = 1386