如图，已知圆锥的底面半径为r=10，点Q为半圆弧$\stackrel{\wedge }{AB}$的中点，点P为母线SA的中点．若PQ与SO所成角为$\frac{\mathrm{\pi }}{4}$，求此圆锥的全面积与体积．

    It's Sunday afternoon. The weather is fine. There is a football match between class 2 and class 4. Many students are watching. They're excited. Now, Zhang Wei has the ball. He passes it to Wei Kun. But Wei Kun can't kick the ball. Then John has the ball. The ball flies to Zhang Wei's arm. Zhang Wei is very angry. The ball files into the goal. How is Zhang Wei feeling? He is so happy! Class 4 won the game. Class 2 is very sad.