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Answers to questions 7, 8 and 9 on page 22 of the sixth grade teaching mathematics book.
7. The volume of grain depot is 3. 14× 1.5? ×2= 14. 13 m3

750×14.13÷1000 =10.05975 tons.

This grain depot can hold 10.05975 tons of corn.

9. How much juice can a glass hold: 3. 14×(6÷2)? ×11= 310.86ml.

Then three cups of juice cost 365,438+00.86× 3 = 932.58 ml, and mother made 800ml of juice, which is obviously not enough.

A: It is obviously not enough to have a drink with a guest.