Respuesta :

efawan
Solution:

No.5
we need to see the ratio of the different length

36:30=36/30=6/5
41.4:34.5=41.4/34.5=6/5

thus,

42:?=42/?=6/5
?=42/(6/5)
?=42 x (5/6)
?=35

No.6 & 7 (use same calculation as above)