Current location - Plastic Surgery and Aesthetics Network - Plastic surgery and beauty - The train travels at a speed of 35 kilometers per hour for 8 hours to reach its destination. If it travels at a speed of 5 kilometers per hour, how many hours will it take to reach its destination?
The train travels at a speed of 35 kilometers per hour for 8 hours to reach its destination. If it travels at a speed of 5 kilometers per hour, how many hours will it take to reach its destination?
1.35×8(35+5)= 7 hours

2。 18.84÷3. 14=6 (diameter length)

The radius is 3 meters.

The bottom area is 3. 14×3×3=28.26 square meters.

The volume of conical coal pile is 1/3× 28.26× 4.5 = 42.39 cubic meters.

All coals weigh 42.39* 1.5= 63.585 tons.

Pull 63.585/6, about 10 car.

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