A) 75 minutes |
B) 84 minutes |
C) 72 minutes |
D) none of these |
B) 84 minutes |
\( \Large t = \frac{d}{v_{1}+v_{2}} = \frac{7.7}{7-1.5} = \frac{7}{5}hrs. \)
\( \Large \frac{7}{5} \times 60 min \) = 84 minutes