1 thua ruong hinh tang co day nho la 18,6m , day lon bang 4/3 day nho . Neu keo dai day lon them, 5 m thi dien tich tang them , 22,5 m2
a) Tinh dien tich thua ruong do
b) Vu vua qua ngoi ta cay tren thuc ruong do, cu 100m2 thu duoc 65,5km lua , Hay tinh xem vu vua qua tren thua ruong nguoi ta thu duoc bao nhieu ta thoc