Question

Three rods of same material, same area of cross section but different lengths 10cm,20cm and 30cm are connected at a point as shown. What is temperature of junction Of?

Answer 1

Explanation:

Given Three rods of same material, same area of cross section but different lengths 10 cm,20 cm and 30 cm are connected at a point as shown. What is temperature of junction Of?

Let the temperature at point o be To

So Ta – To / l1 = To – Tb / l2 + To – Tc /l3

Now 30 – To / 30 = To – 10 / 10 + To – 20 / 20

So 30 – To / 30 = To – 10 / 10 + To – 20 / 20

   30 – To / 30 = 3To – 40 / 20

60 – 2To = 9To – 120

60 + 120 = 9To + 2To

11 To = 180

To = 180 / 11

So To = 16.4

Answer 2

Answer:

16.4

Explanation:

refer the attachment for detailed answer.