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Mathematics application problem, urgent, master, please enter! 1. What's the area of the circle around this 2 m circle with a 10 m diameter flower bed? 2. The perimeter of a square is 7 / 10. How many meters is its side? How many square meters is its area? 3. Calculation [3 / 4-0 divided by (1 / 7 + 2 / 13)] X1 and 1 / 4 [2 - (11.9-8.4x1 and 1 / 3)] divided by 1.3 Please make a formula
1 (10 + 2) / 2 = 6m 10 / 2 = 5m 6 * 6 * 3.14-5 * 5 * 3.14 = 34.54 M2
A: the circular area is 34.54 square meters
7 out of 10 divided by 4 is 7 out of 40 m. 7 out of 40 multiplied by 7 out of 40 equals 49 out of 1600
A: its side length is 7 / 40 meters, and its area is 49 / 1600 square meters
3 [3 / 4-0 divided by (1 / 7 + 2 / 13)] X1 and 1 / 4 = 3 / 4 X1 and 1 / 4 = 15 / 16
There's nothing left to do
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