Question

The cross section of a canal is trapezium in shape the canal is 12 metre wide at the top and 8 metre wide at the bottom of the area of the cross section is 840 square metre the depth of the turnover is

Answer 1

Answer:

12+8/2*h =840

20/2*h=840

10*h=840

h=840/10

h=84 metre

Step-by-step explanation: