Three blocks of masses \( \mathrm{m}_{1}, \mathrm{~m}_{2} \) and \( \mathrm{m}_{3} \) are connec...

Three blocks of masses \( \mathrm{m}_{1}, \mathrm{~m}_{2} \) and \( \mathrm{m}_{3} \) are connected by massless strings as shown in the figure on a frictionless table. They are pulled with a force of \( 40 \mathrm{~N} \). If \( \mathrm{m}_{1}=10 \mathrm{~kg}, \mathrm{~m}_{2}=6 \mathrm{~kg} \) and \( \mathrm{m}_{3}=4 \mathrm{~kg} \), then tension \( \mathrm{T}_{2} \) will be :-