trl n h p h a i 65% bay h I a bao n h ie u say kh o n g ki- l o-g a m c s lj h a o h l:Jt n a o khac n g oa i n lfoc) Nguoi ta p h oi 780 kg th6c tuail sa u kh i p hoi thl k h 6i higng th c g i a m 30kg Tfnh ty so phan tram g i ua hiqng n u'oc va h Jqng t h u a n h � t c6 tro n g th6c da p h Biet rang th6c tu'd'i n u'oc chiem 25o/o va q u a trl n h p h d'i kho n g c6 slf hao hl:lt nao kh a c ngoai n u'6'c Bid 30 Rise a b ove o n eself and g s p the wo rl d