Question

show how would you join three resistors each of ressistance 9ohm so that the equivalent resistance of the combination is 13.5 ohms and 6ohms

Answer 1

i) To get Equivalent resistance 13.5Ω

 We can join two 9Ω resistors parallel and connect this parallel combination to a 9Ω resistor connected in series to this parallel combination. There is a image similar to the combination that is to be used

ii) To get Equivalent resistance 6Ω

  We can join two resistors in series and that series parallel with a single 9Ω resistor. We can make it as same as given in 2nd image leaving R1 resistor in this combination

Sorry I cannot post this pic if it helps mark it as brainliest.