A: The Ferris wheel turns around about 94.2 meters.
3. 14×3×3=28.26 square meters
A: The maximum grazing area of this sheep is 28.26 square meters.
37.68÷3. 14÷2=6
3. 14×6×6= 1 13.04(㎡)
Answer: The floor area is113.04m2..
3. 14×(33×33-30×30)×30
=3. 14× 189×30
=593.46×30
= 17803.8 (kg)
A * * * needs concrete17803.8kg.