The 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_________?
Q1. The 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_________?
Answer: 80 m
Explanation: Area of trapezium = ½ × (sum of parallel sides) × depth. 640 = ½ × (10+6) × d → d = 640/8 = 80 m.