A glass trough is in the shape of a right prism with trapezium base (parallel sides 10 cm & 6 cm, height = 4 cm). If prism height = 20 cm, find volume.
Show answer & explanation
Correct answer: D
Explanation
Parallel sides = 10 cm, 6 cm; Height of the trapezium = 4 cm; Height of the prism = 20 cm
Area of the trapezium = (1/2) × (Sum of parallel sides) × Height
Volume of the prism = Base area × Height
Base area = (1/2) × (10 + 6) × 4 = 32
Volume = 32 × 20 = 640 cm³