tolong bantu jawab pakai caranya

Keliling Roda
= π x d
= 3,14 x 50
= 157 cm

Banyak Putaran = 400 kali

Maka, Panjang lintasan :
= K x 400
= 157 x 400
= 62.800 cm
= 62.800/100 m
= 628 m ✔

d=50cm
r=25cm
π=3,14
putaran=400

lintasan=kelilingxputaran

keliling= 2.π.r
            =2.3,14.24
           = 157cm

lintasan= kelilingxputaran
            =157x400
            =62800cm
            =62m