The percentage exceeding the original plan is: 18÷45=40%.
2. The bottom of the Temple of Heaven's Prayer Hall is about 32.7m in diameter, with a radius of16.25m and an area of 3. 14× 16.35? 839.4 square meters
The radius of the inner circle of the echo wall is 30.8m, and the circumference is 2× 3.14× 30.8 ≈193.4m. ..
3. The altitude of Tianzhu Peak is 16 12m, which is 135m higher than Hanyang Peak, so the height of Hanyang Peak is1612-135 =1477m.
The percentage of Tianzhu Peak higher than Hanyang Peak is:135 ÷1477 ≈ 9.14%.
4. Team A repaired 28% of the total length and two teams repaired 48% of the total length, so team B repaired 48%-28% = 20% of the total length.
The other team B built 24 kilometers, so the total length is 24 ÷ 20% = 120 meters.