Area of a trapezium is 1500 square cm. The distance between parallel sides is 25 cm. One of the parallel side is 40 cm. What is the length (in cm) of the other parallel side of the trapezium?
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Correct answer: C
Explanation
Has been given :
Area = 1500 square cm.
Height = 25 cm.
One parallel side = 40 cm.
According to the formula:
Area of trapezium = (1/2) × (a + b) × h
1500 = (1/2) × (40 + b) × 25
1500 = (25/2)(40 + b)
1500 × 2 = 25(40 + b)
3000 = 25(40 + b)
40 + b = 3000 / 25 = 120
b = 120 − 40 = 80 cm.