两道英语数学题

What is the volume of the following cylinder?

A. 210.91

B. 226.20

C. 75.36

D. 904.32

E. 28.26

Sally has three pieces of material. The first piece is 1 yd. 2 ft. 6 in. long,

the second piece is 2 yd. 1 ft. 5 in long, and the third piece is 4 yd. 2ft.

8in long. How much material does Sally have?

A. 7 yd. 1 ft. 8 in.

B. 8 yd. 4 ft. 4 in.

C. 8 yd. 11 in.

D. 9 yd. 7 in.

E. 10 yd.

顺便帮我翻译一下题目，写出过程啊

圆柱体的体积是多少？B

∏r²×h=3.14159*3*3*8≈226.20

sally有三片材料，第一件是1码2英尺6英寸长， 第二件是2码1英尺5英寸长，第三部分是4码2英尺
8英寸长。shally有多少材料呢？D

1 Yard = 3 ft

12 in = 1 ft

If you add up the pieces you'll get 7 yrd, 5 ft, and 19 in

5 ft/3 ft = 1 yrd and 2 in -------------------------(1)

19 in / 12 in = 1 ft and 7 in ---------------------(2)

We have 7 yrd plus one yrd from (1) = 8 yrd

and 5 ft plus one ft from (2), now we have

8 yrd 3 ft and 7 in ------------------(3)

again 3 ft/3 ft = 1 yrd -------------(4)

add the 1 yrd from (4) to (3) you'll get 9 yrd and 7 in.

The correct answer D

下面圆柱体的体积是哪个

B

D