Ram 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 he been driving at 20 kmph?
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t1+t2=8
20 t1 + 70 t2 = 400
solve above 2 equation
t1 will be your answer
20 t1 + 70 t2 = 400
solve above 2 equation
t1 will be your answer
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