the cross-section of a cannel is a trapezium in shapif 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---------?

40 m

80 m

60 m

20 m

the cross-section of a cannel is a trapezium in shapif 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---------?

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