am covers a part of the journey at 20 kmph and the balance at 70 kmph taking total of 8 hours to cover the distance of 400 km. How many hours has been driving at 20 kmph?

am covers a part of the journey at 20 kmph and the balance at 70 kmph taking total of 8 hours to cover the distance of 400 km. How many hours has been driving at 20 kmph?

A.

2 hours

B.

3 hours 20 minutes

C.

1 hour 40 minutes

D.

3 hours 12 minutes

Answer

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