Q8. Which of the following is an example of inverse variation?
O The number of books you buy and their total cost
O The part of the tank filled and the number of pipes used to fill the tank
O The number of men constructing the road and the time taken to finish it
O The litres of petrol consumed and the distance covered.
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Answer:
Perimeter of trapezium = 104 m
Length of Non-parallel sides = 18 m and 22 m
Altitude = 16m
Area of Trapezium = ½ × (sum of parallel sides)×altitude ------ (1)
Sum of parallel sides = Perimeter - (sum of non-parallel sides) = 104 m - (18+22)m = 104–40 m = 64 m
From (1), Area of Trapezium = 0.5×64×16 = 512 m²
Ans: Area of trapezium = 512 m²
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