+0  
 
0
49
1
avatar

A truck travels for 4 hours at an average speed of 47 miles per hour. How much longer must the truck travel at an average speed of 61 miles per hour so that the average speed for the total trip will be 50 miles per hour? (Round your answer to one decimal place.)

 Sep 26, 2021
 #1
avatar+35059 
+1

{ (4* 47 )+( 61 * x)  } / (4+x)    = 50     solve for 'x' hours

 Sep 26, 2021

38 Online Users

avatar