Question

A car is traveling at 50 km/hr. It increases its speed by 10 km/hr after y hours, and then travels for (y + 7) hours more. If the distance covered in the last (y + 7) hours is 720 km, find the distance covered in the first y hours.

A 220 km
B 250 km
C 270 km
D 200 km
E None of these
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