Mot thua ruong HCN co chu vi la 45.6m . Biet chieu dai hon chieu rong 6.2m
a) Tinh S thua ruong do
b) Ng ta thu hoach cu 100m2 thu dc 54.6 kg ngo . Hoi ca thua ruong do thu hoach dc bao nhieu ta ngo
c) Neu ng ta danh 30% S de dao ho chua nc . Hoi S dao ho la bao nhieu ?