See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

T1 + T2 = 20 T2L = 20 x 2 20x T 20x L   1 T 20(1 x)   Also, 1 2 T T 1 1 2      1 2 T 4T  20(1x) = 80 x 20  20x = 80x  20 x 100   x = 20 cm