SOLUTION: I traveled 180 km at the speed of 45 km/hr and arrived 15 minutes late. at what speed in (km/hr) should i have traveled to arrive on time? A)40 B)43 C)44.5 D)48

Question 879122: I traveled 180 km at the speed of 45 km/hr and arrived 15 minutes late. at what speed in (km/hr) should i have traveled to arrive on time?
A)40
B)43
C)44.5
D)48
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = your speed to arrive on time in km/hr
Let = your elapsed time to arrive on time in hrs
------------------------
(1)
(2) ( note that 15 min = 1/4 hr )
--------------------------
(2)
(2)
(2)
(2)
and
(1)
(1)
(1)
My answer is (D), 48 km/hr

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