D=6m 3. 14×6= 18.84 (m)

R = 5cm 2× 3.14x5 = 31.4 (cm)

2. Solution: Let the cylinder diameter be x meters. According to c = π d, 3. 14x = 3.77.

x=3.77÷3. 14

x≈ 1.2

A: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~.

3. Distance traveled by bicycle per minute: 3.14× 66×100 = 20724 (cm) ≈ 207 (m).

About the time required from home to school: 2000÷207≈ 10 (minutes).

A: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~.

After 4.30 minutes, the distance traveled by the minute hand tip is 2×3. 14×20×60 30 = 62.8 (cm).

After 45 minutes, the distance traveled by the minute hand tip is 2×3. 14×20×60 45 = 94.2 (cm).

Answer: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Landlord, that's all I can find. Give it to me ~ ~ ~ ~ ~