Question

11,12 plzzz urgent ❤️

Answer 1

11. 60 pers
sec decorativ = 60 : 4 = 15 pers
60 - 15 = 45 pers rămase
sec plante rare = 45 : 5 = 9 pers
45 - 9 = 36 pers rămase
sec flora dobrogei = 10 pers
36 - 10 = 26 pers rămase = sec rosarium
răspuns: 26 pers

12. d = distanță; t1 = timpul parcurs până la grăunte; t2 = timpul parcurs de la grăunte
v × t = d
v1 × t1 = d
8cm × t1 = d
t1 = d : 8cm
v2 × t2 = d
4cm × t2 = d
t2 = d : 4cm
t = t1 + t2
d : 8 + d : 4 = 60 sec | × 8
d + 2d = 60 sec
3d = 60 sec
d = 20 cm