An army unit prepares some rice for 50 people to eat in 10 days. Three days later, 20 more people arrived. Foul how many additional rice units should be added so that enough units can be eaten in the following days? (Look at each person's rice intake one day is 1 rice)

Eggs are equal to 3/4 of duck eggs. When adding 30 eggs, the number of eggs is 9/10 of duck eggs. Egg size, duck eggs

The total amount of cement in warehouse A and warehouse B is four times the amount of cement in warehouse B. Calculate the number of cement in stock A that warehouse A is more than warehouse B is 216 tons

Find x, y know \(\dfrac{x}{2}=\dfrac{y}{5}\)  and x.y = 10

Help with Nguyen Viet Hoang too hard; Vu Thi Huong Giang; ....................; Something something helps with