数学题：一个圆柱形水池,直径16米,深1.5米。
1.占地面积=圆面积=πr²=3.14*8*82.水泥面积=圆周长*深度=2πr*1.5=2*3.14*8*1.5
3.挖土=圆柱体积=πr²h=3.14*8*8*1.5
绛旓細=3.14脳0.25脳0.8锛=0.628锛堢珛鏂圭背锛夛紱锛3锛3.14脳1脳0.8+3.14脳锛1梅2锛 2 锛=2.512+0.785锛=3.297锛堝钩鏂圭背锛夛紱绛旓細杩欎釜姘存睜鍗犲湴闈㈢Н鏄0.785骞虫柟绫筹紝鎸栨垚杩欎釜姘存睜锛闇鎸栧湡0.628绔嬫柟绫筹紱
绛旓細鍗婂緞锛1.8脳1/2锛0.9绫 瀹圭Н锛3.14脳0.9脳0.9脳0.9 锛2.28906绔嬫柟绫
绛旓細2.姘存偿闈㈢Н=鍦嗗懆闀*娣卞害=2蟺r*1.5=2*3.14*8*1.5 3.鎸栧湡=鍦嗘煴浣撶Н=蟺r²h=3.14*8*8*1.5
绛旓細1.鍗犲湴闈㈢Н鏄槸鍦嗘煴鐨勫簳闈㈢Н锛3.14脳锛16/2锛²=200.96骞虫柟绫 2.姹犲簳闈㈢Н灏辨槸棰樼洰涓锛屾睜澹侀潰绉槸鍦嗘煴渚ч潰绉細200.96+3.14脳16脳1.5=276.32骞虫柟绫 3.灏辨槸浣撶Н锛200.96脳1.5=301.44绔嬫柟绫
绛旓細鐩村緞鏄5绫冲惂 鍗婂緞鏄5梅2=2.5绫 鎵浠ユ槸3.14脳2.5脳2.5+3.14脳5脳1.5=43.175骞虫柟绫
绛旓細1.钃姘存睜鐨勪綋绉槸锛氾紙12梅2锛²蟺脳1.5=169.56锛堢珛鏂圭背锛壪鍙3.14 2.鍏跺疄灏辨槸钃勬按姹犵殑渚ч潰绉細12蟺脳1.5脳10=565.2kg锛埾鍙3.14锛夋湜閲囩撼锛屾湁涓嶄細鐨勯棶鎴憕~
绛旓細鍦嗘煴浣浣撶Н璁＄畻鍏紡锛歏=S*h, S鏄簳闈㈢Н锛宧鏄珮銆傛棰樹腑锛屽湴闈鐩村緞鏄6绫筹紝鍙ゅ崐寰勬槸3绫筹紝鑻ュ渾鍛ㄧ巼鍙3.14锛岀敱鍦嗙殑闈㈢Н鍏紡绠楃殑搴曢潰绉槸28.26锛屽啀涔樹互楂1.5绫冲緱浣撶Н涓42.39绔嬫柟绫筹紝鍗42.39鍚ㄣ
绛旓細浣犲ソ 闈㈢Н=3.14*10*2+3.14*锛10梅2锛²=3.14*20+3.14*25=3.14*45=141.3骞虫柟绫 鎶逛笂姘存偿鐨勯潰绉湁141.3骞虫柟绫 銆鏁板杈呭鍥戜负鎮ㄨВ绛旓紝濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚寰楅噰绾 绁濆涔犺繘姝ワ紒
绛旓細鍏堢畻鍑哄嚭瀹冪殑鍗婂緞锛6/2=3m 搴曢潰绉細3*3*3.14=28.26骞虫柟绫 渚ч潰绉細6*3.14*1.2=21.608骞虫柟绫 鎶规按娉ラ潰绉紙琛ㄩ潰绉級锛28.26+21.608=50.868骞虫柟绫 绛 鎶规按娉ョ殑闈㈢Н鏄50.868骞虫柟绫炽
绛旓細浣犲ソ锛氬簳闈㈢Н=3.14脳锛16梅2锛²=200.96锛堝钩鏂圭背锛夊绉=200.96脳1.5=301.44锛堢珛鏂圭背锛変晶闈㈢Н=3.14脳16脳1.5=75.36锛堝钩鏂圭背锛夋姽姘存偿闈㈢Н=75.36+200.96=276.32锛堝钩鏂圭背锛夐渶瑕佹按娉=276.32脳10=2763.2锛堝崈鍏嬶級
