Answer: The length of aluminium rod at 65°C is 5.2 meters.
Step-by-step explanation:
We are given:
Length of aluminium rod at 15°C = 1.2 meters
We need to find the length of aluminium rod at 65°C
To find the length, we use unitary method:
At 15°C, the length of aluminium rod is 1.2 meters
So, at 65°C, the length of aluminium rod will be =

Hence, the length of aluminium rod at 65°C is 5.2 meters.