Nil and Ethan are brothers. They left their home
at the same time and drove to the same beach.
Nil drove at a speed of 70 miles per hour. Ethan
drove at a speed of 20 miles per hour. Nil
arrived at the beach 0.5 hour earlier than Ethan.
What is the distance between their home and the
beach? Select
A) 80 miles  B) 70 miles  C) 60 miles  D) 50 miles  E) 40 miles
Every hour, Nil gets ahead of Ethan  70 - 20= 
<gadget id="calculator"> 70 - 20</gadget>
<output>50</output>
50 miles. When Nil arrived at the beach, Ethan   is only 20 × 0.5= 10 miles behind. That tells us   they only drove 1 hour when Nil arrived at the   beach.   The distance between their home and the beach   is   Nil’s speed × Nil’s time   = 70 × 1 = 70 miles.   correct answer 70 miles
<result>B</result>
Nil and Ethan are brothers. They left their home
at the same time and drove to the same beach.
Nil drove at a speed of 70 miles per hour. Ethan
drove at a speed of 20 miles per hour. Nil
arrived at the beach 0.5 hour earlier than Ethan.
What is the distance between their home and the
beach?