iyan 45 kg berlari jauh 200m selama 1 menit usaha yang dilakukan iya adalah....(9=10N/kg)

Dik = m = 45Kg
s = 200m
t = 1 menit
g = 10N/Kh
Dit = w=....?
Jwb= F = m.g
= 45Kg x 10N/Kg
=450N
w = F x s
= 450N x 200m
= 90.000Nm
=90.000Joule:1000Kg
=90Kj
(maaf kalau salah)