一个圆柱形水池内侧的底面直径是1.8m,高0.9m。这个水池最多能装水多少立方米水? 一个圆柱形水池的底面直径是20米,深是3米.这个水池最多能装...
\u4e00\u4e2a\u5706\u67f1\u5f62\u6c34\u6c60\u5185\u4fa7\u7684\u5e95\u9762\u76f4\u5f84\u662f\u4e00\u70b9\u516b\u7c73\u9ad8\u96f6\u70b9\u4e5d\u7c73\u8fd9\u4e2a\u6c34\u6c60\u6700\u591a\u80fd\u88c5\u6c34\u591a\u5c11\u7acb\u65b9\u7c733.14*0.9*0.9*0.9=2.289
\u6700\u591a\u80fd\u88c5\u6c342.29\u7acb\u65b9\u7c73
\u5e95\u9762\u534a\u5f84\uff1a20\u00f72=10\u7c73
\u6700\u591a\u80fd\u88c5\u6c34\uff1a
3.14\u00d710²\u00d73
=3.14\u00d7100\u00d73
=942\uff08\u7acb\u65b9\u7c73\uff09
容积:3.14×0.9×0.9×0.9
=2.28906立方米
绛旓細鍙兘鏄按姹犲簳闈㈢洿寰勪负3m锛屽彲鑳芥槸鎶勯鏃舵妸3m鎶勬垚3cm銆
绛旓細搴曢潰鐩村緞8绫趁楋紙鍦嗗懆鐜囷級3鐐14 16脳楂3鐐5绫 =25鐐13 28脳3鐐5绫 =87鐐96 48骞虫柟绫銆傜鍥涢儴锛氳绠楀嚭鏉ヨ繖涓按姹犵殑搴曢潰鍜屽洓鍛ㄦ姽涓婃按娉ラ儴鍒嗙殑闈㈢Н銆傦紙涔熷氨 璇存槸璁$畻渚ч潰绉拰涓涓簳闈㈢殑闈㈢Н涔嬪拰銆傦級鐢ㄤ晶闈㈢Н鍔犱笂搴曢潰绉瓑浜庢婚潰绉傜敤50鐐26 56骞虫柟绫冲姞涓87鐐96 48骞虫柟绫=138鐐22 74...
绛旓細绛旓細杩欎釜鍦嗘煴褰㈡按姹犵殑瀹圭Н鏄100.48绔嬫柟绫銆
绛旓細鐩村緞鏄5绫冲惂 鍗婂緞鏄5梅2=2.5绫 鎵浠ユ槸3.14脳2.5脳2.5+3.14脳5脳1.5=43.175骞虫柟绫
绛旓細搴曢潰鍗婂緞鏄 10梅2锛5锛堢背锛夊簳闈㈢Н鏄 5脳5脳3.14锛78.5锛堝钩鏂圭背锛変晶闈㈢Н鏄 10脳3.14脳6锛188.4锛堝钩鏂圭背锛夌摲鐮栫殑闈㈢Н鏄 78.5锛188.4锛266.9锛堝钩鏂圭背锛
绛旓細搴曢潰绉=3.14*锛4/2锛塣2=12.56骞虫柟绫 渚ч潰绉=3.14*4*1.5=18.84骞虫柟绫 鍒欐婚潰绉=12.56+18.84=31.4骞虫柟绫 闇瑕佹按娉ヤ负 2.5*31.4=78.5鍗冨厠
绛旓細鍒搴曢潰闈㈢Н涓$\pi \times 5^2 = 78.54$骞虫柟绫炽姘存睜鐨勫唴渚闈㈢Н涓哄渾鏌渚ч潰绉紝鍗$2\pi rh$锛屽叾涓$r=5$绫涓烘按姹鍗婂緞锛屽垯$2\pi rh = 18.84$骞虫柟绫炽傚皢$r=5$浠e叆涓婂紡寰$10\pi h=18.84$锛岃В寰$h=\frac{18.84}{10\pi}\approx0.6$绫炽傚洜姝わ紝姘存睜鐨勬繁搴﹀ぇ绾︿负0.6绫炽
绛旓細鍒嗘瀽锛氬簳闈㈠懆闀垮氨鏄鍦嗘煴搴曢潰鐨勫渾鐨勫懆闀匡紝鐭ラ亾鐩村緞鍙互鐢–=鍦嗗懆鐜噚鐩村緞锛屽垪寮忎负3.14x8=25.12锛坢锛夊簳闈㈢Н=鍦嗗懆鐜噚锛堢洿寰劽2锛夌殑骞虫柟锛屽垪寮忎负3.14x锛8梅2锛塣2=50.24锛堝钩鏂圭背锛夈傛暚璇烽噰绾筹紒
绛旓細2.鐮涓涓渾鏌鍨嬫按姹狅紝搴曢潰鐩村緞鏄4绫筹紝娣3绫筹紝鍦姘存睜鐨鍛ㄥ洿涓庡湴闈㈡姽姘存偿锛屾姽姘存偿鐨勯儴鍒嗘槸澶氬皯骞虫柟绫筹紵瑙o紝寰楋細3.14*锛4/2)^2+3.14*4*3==50.24(骞虫柟绫)鎵浠ラ渶瑕佹姽姘存偿鐨勯儴鍒嗘槸50.24骞虫柟绫 3.涓涓簳闈㈠崐寰勬槸3鍘樼背锛岄珮4鍘樼背鐨鍦嗘煴褰鏈ㄥご锛屾妸瀹冨姞宸ユ垚鏈澶х殑鍦嗛敟浣擄紝杩欎釜鍦嗛敟鐨勪綋绉槸澶氬皯...
绛旓細鍗婂緞鏄 16梅2=8锛堢背锛夊绉槸 8脳8脳3.14脳1.5=301.44锛堢珛鏂圭背锛搴曢潰绉槸 8脳8脳3.14=200.96锛堝钩鏂圭背锛変晶闈㈢Н鏄 16脳3.14脳1.5=75.36锛堝钩鏂圭背锛夋姽姘存偿鐨勯潰绉槸 200.96+75.36=276.32锛堝钩鏂圭背锛