Statement I:
Let the actual time taken by Ravi to reach the college be 't'.
If Ravi travels at a speed of 5 km/hr, time taken is t + $\frac{10}{60}$
If Ravi travels at a speed of 6 km/hr, time taken is t - $\frac{4}{60}$
Distance = speed*time = P = $5\left(t+\frac{10}{60}\right)=6\left(t-\frac{4}{60}\right)$
$5\left(t+\frac{10}{60}\right)=6\left(t-\frac{4}{60}\right)$
$5t+\frac{50}{60}=6t-\frac{24}{60}$
$t=\frac{74}{60}$
Distance(P) = $5\left(\frac{74}{60}+\frac{10}{60}\right)=5\left(\frac{84}{60}\right)=7$ km
Therefore, statement I is incorrect.
Statement II:
Let the speed of Babita be 3x.
The speed of Amit is 7x.
B covers distance y.
In the same time, A should cover 80+y.
$\frac{y}{3x}=\ \frac{\ 80+y}{7x}$
7y = 240 + 3y
4y = 240
y = 60
Total distance = 80 + 60 = 140m
Therefore, statement II is correct.
The answer is option D.