A bus traveled from its depot to its destination at an average speed of 60 kilometers per hour. On its return to the depot along the same route, the bus traveled at an average speed of only 40 kilometers per hour, making the trip 4 hours longer. What is the total distance of the round trip? Choose the correct choice from the following options
A) 360 kilometers  B) 400 kilometers  C) 600 kilometers  D) 800 kilometers  E) 960 kilometers
Let time for first trip be x hrs   For first trip distance travelled = 60x   For round trip distance travelled 40(x+4) = 40x+160   60x = 40x + 160   x = 8 hrs.   Total Round trip distance = 60*8*2= 
<gadget id="calculator">60*8*2</gadget>
<output>960</output>
960 kilometers 960 kilometers
<result>E</result>
A bus traveled from its depot to its destination at an average speed of 60 kilometers per hour. On its return to the depot along the same route, the bus traveled at an average speed of only 40 kilometers per hour, making the trip 4 hours longer. What is the total distance of the round trip?