A jeep travels a certain distance taking 6 hours in the forward journey. During the return journey, it increased its speed by 12km/hr and took 4 hours. What is the distance travelled by the jeep?	Select:
A) 126km	B) 144km	C) 127km	D) 228km	E) 128km
Let 'x' be the distance and 'y' be the speed of the forward journey. Then, we have 6v=d and 4(v+12)=d   =&gt; v=d/6 and v=d/4 - 12   =&gt; d/6 = d/4 - 12   =&gt; d/12 = 12   =&gt; d=144   Answer: 144km
<result>B</result>
A jeep travels a certain distance taking 6 hours in the forward journey. During the return journey, it increased its speed by 12km/hr and took 4 hours. What is the distance travelled by the jeep?