bài khó

M

minvip501

cau nay chon C ban nha
T tang them 5% thi T sau do la 1,05T
ban cho 1,05 vao trong can va gan voi l
khi do chieu dai l la 1,1025L
tru di L la chieu dai ban dau ra 0,1025L
=>can tang them 10,25%
 
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