A bus is going to Goa from Pune. With 4 stops of 15 minute each, the average speed of the bus comes out to be 45 m/hr. But if the driver takes the bus without any stops, the average peed comes out to be 50 km/hr.

450 km

It is given in  the question that ,

There are 4 stops of 15 minutes each.

Total time spent in stops = 4 × 15 = 60 minutes

60 minutes = 1 hour

Let us consider that Time taken  without stops = t hours

Formula used is :- Distance = Speed × Time

Distance is same. So,

S1 × T1 = S2 × T2

50 × t = 45 × ( t + 1 )

50t = 45t + 45

5t = 45

t = 9 hours

Distance from Goa to Pune = 50 × 9 = 450 km