Answer :-
25 km
Solution :-
Speed of the car in first 15 mins ,
The car is moving in the speed of 40 km/h for 15 mins.
- Distance covered = speed × Time taken
- Distance covered = 240 × 15/60 = 10 km
Speed of car in next 15 mins ,
again ,
- distance covered = 60 × 15/60 = 15km
now , total distance covered = ( 10 + 15 ) km = 25 km
Hope it helps~