A bullock cart has to cover a distance of 80km in 10hrs. If it covers half of the journey in 3/5th time. what should be its speed to cover the remaining distance in the time left.	Choose the correct choice from the following.
A) 10 kmph speed	B) 20 kmph	C) 30 kmph	D) 40 kmph	E) 50 kmph
10 kmph speed   10 kmph   Time left = 10 - 3/5*10= 
<gadget id="calculator">10 - 3/5*10</gadget>
<output>4</output>
4 hr 10 km/h   speed=40 km /4 hr   =10 kmph
<result>A</result>
A bullock cart has to cover a distance of 80km in 10hrs. If it covers half of the journey in 3/5th time. what should be its speed to cover the remaining distance in the time left.