Answer:
210 miles
Step-by-step explanation:
Using the relationship between distance (d) , speed (s) and time (t)
• s = [tex]\frac{d}{t}[/tex]
given he drove 840 miles in 12 hours , then his speed is
s = [tex]\frac{840}{12}[/tex] = 70 miles per hour
Based on this speed , then distance travelled in 3 hour
70 = [tex]\frac{d}{3}[/tex] ( multiply both sides by 3 )
210 = d
He could drive 210 miles at a speed of 70 mph]
