Question 884670
RT=D Key Concept Equation
{{{(1/2)hour=30*minutes}}}
Let r = original speed


__________________rate_________time________distance
Regular___________r____________2___________(_____)
Half-speed________r/2__________1/2_________(_____)
TOTAL______________________________________84


Unfinished intentionally, but this initial set-up should be quickly and effectively helpful.