Question

how I can solve this problem operation 6

Answer 1

57 books weight = 11400gm
1 book weight = 11400/57 gm
1 book weight = 200 gm

so, 71 books will be = 200gm × 71
= 14200gm
= 14 kg 200gm

Answer 2

57 books =11400g
71 books =?
1 book =11400/57=200g
So 71 books = 200 x 71=14200g
i.e.14 kg 200 g