The cross-section of a cannel is a trapezium in shape. If the cannel is 8 m wide at the top and 6 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?	Choose one.
A) 76 B) 100 C) 27 D) 80 E) 25
1/2 * d (8+ 6) = 700   d = 100   Answer: 100
<result>B</result>
The cross-section of a cannel is a trapezium in shape. If the cannel is 8 m wide at the top and 6 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?