Question 429077
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Hi
Let x represent the length of the 3rd side.
Question states*** Converting info given to improper fractions
 4/3cm + 11/5 cm + x = 211/30 cm  |Multiplying each term by 30 
 40 + 66 + 30x = 211
          30x = 105
            x = 3.5cm Or 3 1/2 cm

CHECKING our Answer***
  4/3 + 11/5 + 7/2 = (40 + 66 + 105)/30 = 211/30