Question

A car was moving at a speed of 50 km/hr for ‘x’ hours. Later, its speed increased by 10 km/hr and it continued to travel for (x + 5) hours more. If the distance covered in the second part of the journey is 660 km, then what distance did the car travel in the first ‘x’ hours?

A 252 km
B 300 km
C 370 km
D 450 km
E None of these
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