A family travelled for 12 hours. They covered the first half of the distance at 35 kmph and remaining half of the distance at 40 kmph. Find the distance travelled by the family?
Select.
A) 270 km	B) 890 km	C) 684 km	D) 320 km	E) 560 km
Let the distance travelled be x km.   Total time = (x/2)/35 + (x/2)/40 = 12 =&gt; x/70 + x/80   = 12 =&gt; (8x + 7x)/560 = 12 =&gt; x   = 560 km   Answer: 560 km
<result>E</result>
A family travelled for 12 hours. They covered the first half of the distance at 35 kmph and remaining half of the distance at 40 kmph. Find the distance travelled by the family?