(d) $T = \frac{2 \times m_{B}m_{C}}{m_{A} + m_{B} + m_{C}} \times g = \frac{2 \times 1 \times 5}{3 + 1 + 5} \times g = \frac{10}{9}g$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.