Cross-section of a cannel is a trapezium in shape. If the cannel is 10 m wide at the top and 6 m wide at the bottom and the area of cross-section is 640 sq m, the depth of cannel is ?

A. 80 m
B. 40 m
C. 20 m
D. 60 m

Leave a Reply

Your email address will not be published. Required fields are marked *