a plane travelled k miles in 1st 96 miles of flight time.if it completed remaining 300 miles of the trip in 1 minute what is its average speed in miles/hr for entire trip ?	Select the correct option.
A) 396/60+k	B) 376/60+k	C) 386/60+k	D) 366/60+k	E) 356/60+k
k=96+300= 
<gadget id="calculator">96+300</gadget>
<output>396</output>
396 miles   tot time= 1min + k   avg speed= 396/60+k   396/60+kNSWER:396/60+k
<result>A</result>
a plane travelled k miles in 1st 96 miles of flight time.if it completed remaining 300 miles of the trip in 1 minute what is its average speed in miles/hr for entire trip ?