Technically nothing times 3 get you 16 but 3 times 5 equals 15 which is the closest answer but the answer would be 5.3
Answer: Length of shorter side is 2.8 cm.
Explanation:
Since we have given that
Dimensions of a room are given by

On a plan, the longer side = 4 cm
As we know that the ratio of original room is equal to ratio of plan room
So,

So, length of shorter side is 2.8 cm.
T=cost of one television
D= cost of one DVD player
2t+3d= 1421
D=t(1/2)
Replace d by t(1/2)
2t+3(t1/2)= 1421
3.5 t = 1421
T= 691.7 $
Good luck