圆锥的底面半径=圆柱的底面半径=6.28÷2÷3.14=1米圆锥的容积=(1/3)×3.14×1²×0.3=0.314立方米圆柱的容积=3.14×1²×2=6.28立方米谷囤的容积=0.314+6.28=6.594立方米稻谷重=6.594×65=428.61千克
429
