The area and height of an ≡ angle and a parallelogram are equal, respectively. The bottom of the triangle is 24 cm?

The area and height of an ≡ angle and a parallelogram are equal, respectively. The bottom of the triangle is 24 cm?

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The height of a triangle is 5cm and its area is 24cm. The height of a parallelogram is () cm

This problem is very simple, as long as master parallelogram and triangle base, height, area between the three relations on the line
(1) The area of parallelogram is 2 times of that of triangle if parallelogram and triangle have the same base and height;
(2) If parallelogram and triangle are equal product and equal base, the height of parallelogram is 1 / 2 of that of triangle;
(3) If the parallelogram is equal to the triangle, the bottom of the parallelogram is 1 / 2 of the triangle
This problem is in line with the second case, so it is easy to find the height of the equal quadrilateral: 5 △ 2 = 2.5cm
Remember these relations, and then solve this kind of fill in the blanks with only oral calculation

It costs 672 yuan to buy a triangular steel plate with a bottom of 14m and a height of 8m. How much is the average price per square meter?

672 ^ (14 × 8 ^ - 2) = 672 ^ - 56 = 12 yuan a: this kind of steel plate costs 12 yuan per square meter on average