A dam released 1000 cubic meters of water at a rate of 10 cubic meters per minute, and then released another 1000 cubic meters at a rate of 20 cubic meters per minute. What was the avg rate at which the water was released?
How do I go about this question ?

Question

A dam released 1000 cubic meters of water at a rate of 10 cubic meters per minute, and then released another 1000 cubic meters at a rate of 20 cubic meters per minute. What was the avg rate at which the water was released? 
How do I go about this question ?

anonymous · Answer

1000/10 = 100
1000/20 = 50 
100+50 = 150
2000/150 = 40/3 = 13.33 m^3/s