The cross-section of a cannel is a trapezium in shape. If the cannel is 6 m wide at the top and 4 m wide at the bottom and the area of cross-section is 10290 sq m, the depth of cannel is?  Select the correct option:
A) 258 B) 260 C) 262 D) 264 E) 266
1/2 * d (6+4)   = 10290   d = 258   258nswer: 258
<result>A</result>
The cross-section of a cannel is a trapezium in shape. If the cannel is 6 m wide at the top and 4 m wide at the bottom and the area of cross-section is 10290 sq m, the depth of cannel is?