Răspuns :
15 dulapuri
1 dulap are 6 rafturi
1 raft are 23 carti
6x23=138 carti intr-un dulap
15x138=2070 carti in 15 dulapuri
sau
15x6x23=2070 carti in total
R: in biblioteca sunt 2070 de carti
1 dulap are 6 rafturi
1 raft are 23 carti
6x23=138 carti intr-un dulap
15x138=2070 carti in 15 dulapuri
sau
15x6x23=2070 carti in total
R: in biblioteca sunt 2070 de carti