The cross-section of a cannel is a trapezium in shape. If the cannel is 5 m wide at the top and 3 m wide at the bottom and the area of cross-section is 3800 sq m, the depth of cannel is?	Choose the correct answer
A) 920	B) 930	C) 940	D) 950	E) 960
1/2 * d (5+3)   = 3800   d = 950   Answer: 950
<result>D</result>
The cross-section of a cannel is a trapezium in shape. If the cannel is 5 m wide at the top and 3 m wide at the bottom and the area of cross-section is 3800 sq m, the depth of cannel is?