Two identical square rods of metal are welded end to end as shown in figure (a). Assume
Channel: Doubtnut
Date: 2020-04-12

Two identical square rods of metal are welded end to end as shown in figure (a). Assume that `10` cal of heat flows through thr rod in `2min`. Now the rods are welded as shown in figure (b). The time it would take for `10` cal to flow through the rods now, is