... mkNqaMx=ììì==54 211 104 17 4 17 2, kNqLQy52 71 1 04 11 4 11 ,=ìì== cmycmynk 674 4 ,,,,maxmax== 24 71 3 44 cmkNyJMkxxmm/,, 13 88,44250 maxmax=ì== 7, 6cm 4,4cm 3ql ... 342,68,053,44 7 4 7 =ìì== PaMx vaứ kN 923 ,7 4 7 == PQy 3cm 37 ,18 2 )72 , 010 ( 72 ,05,5 =ìì=cxS 2kN/cm 634 ,1 45, 019 8 37 ,18 53,44 7 =ììì=zy 2kN/cm 71 , 1 372 ,02 10 19 82,634=ì=z Theo ... =0 ,72 cm,t=0,9cm JX =15 20cm4 ,WX =15 2cm3 SX= 87, 8cm3, Tính: 4236 570 211 6 510 12 13 162 cmJJxX=+ìì+ì= )),(( []=xxzWMMaxmax , vụựi 335 97 11 6 570 2cmHJWXx,===...