mot thua ruong hinh chu nhat co chieu dai la 70m,chieu rong kem chieu dai 25m
a) tinh chu vi va dien tich thua ruong do
b)biet rang cu 10m2 thu hoach duoc 40kg thoc.Hoi tren ca thua ruong do thu hoach duoc bao nhieu kg thoc ?
nhanh nha cac ban mik can gap