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A trapezoidal vegetable field, with an area of 270 square meters, has a top bottom of 28 meters and a bottom of 32 meters. How high is it
270×2÷（28+32）
=540÷60
=9 meters
The height is 9 meters
The bottom of a trapezoidal orchard is 1.4 times that of the top. The top is 60 meters shorter than the bottom, and the height is 40 meters. What is the area of this orchard?
60 / (1.4-1) = 150 (m)
150 * 1.4 = 210 (m)
(150 + 210) * 40 / 2 = 7200 (M2) = 0.72 (HA)
Answer:
A trapezoidal orchard, the top bottom is 15 kilometers, the bottom is 310 kilometers, the height is 18 kilometers. How many square kilometers is the area of this orchard?
S = (a + b) H / 2, = (15 + 310) × 18 / 2, = 12 × 18 / 2, = 132 square kilometers; a: this orchard covers an area of 132 square kilometers
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