The cross-section of a cannel is a trapezium in shape. If the cannel is 16 m wide at the top and 4 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?	Pick
A) 76
B) 28
C) 27
D) 80
E) 70
1/2 * d (16 + 4) = 700   d = 70   Answer: 70
<result>E</result>
The cross-section of a cannel is a trapezium in shape. If the cannel is 16 m wide at the top and 4 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?