200 mu = square meter?

200 mu = square meter?

1 mu = 666.67 square meters
200 mu = 200 * 666.67 = 133334 square meters

12 million mu = how many square meters?

I only know 1 ha = 15 mu, so 12 million mu = 800000 ha = 8 billion m2

One table and four legs are needed to make a table. 20 tables can be made from 1m3 wood, or 400 legs can be made from 12m3 wood. How can we plan to use materials to make as many tables as possible?

If x tables are made, the material of the table top is 120xm3, and the wood of the legs is (4 × 1400x) m3. From the meaning of the question, we get 120x + 4 × 1400x = 12, and the solution is x = 200. Then 120x = 120 × 200 = 10 (M3) 12-10 = 2 (M3). A: we can make as many tables as possible by using 10m3 wood as the table top and 2m3 wood as the legs