the cross - section of a water channel is a trapezium in shape. if the channel is 14 meters wide at the top and 8 meters wide at the bottom and the area of cross - section is 990 square meters, what is the depth of the channel ( in meters )?
Choose the correct choice from the following answers:
A) 50 B) 60 C) 70 D) 80 E) 90
<gadget id="calculator">14 + 8</gadget>
<output>22</output>

<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<gadget id="calculator">990 / 11</gadget>
<output>90</output>

<result>E</result>
the cross - section of a water channel is a trapezium in shape. if the channel is 14 meters wide at the top and 8 meters wide at the bottom and the area of cross - section is 990 square meters, what is the depth of the channel ( in meters )?
divide(990, divide(add(14, 8), const_2))
"1 / 2 * d * ( 14 + 8 ) = 990 d = 90 the answer is e ."