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 been driving at 20 kmph?	Options:	A) 3.2 hr	B) 3.4 hr	C) 3.6 hr	D) 3.8 hr	E) 4.2 hr
let see d/t =v then x/20 + (400-x)/70 =8   x= 64 kmh   t = 64/20= 
<gadget id="calculator">64/20</gadget>
<output>16/5 = around 3.2</output>
3.2 hr   3.2 hrNSWER:3.2 hr
<result>A</result>
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 been driving at 20 kmph?