SOLUTION: a car travels from a to b in 10 sec. with a speed of 54 km per hr and return with a speed of 96 km per hr in 5 sec. what is the average speed

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Question 877381: a car travels from a to b in 10 sec. with a speed of 54 km per hr and return with a speed of 96 km per hr in 5 sec. what is the average speed
Found 2 solutions by josmiceli, Alan3354:
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
Average speed is always: ( total distance ) / ( total time )
Total time = sec
convert sec to hrs
( sec ) x ( min/sec ) x ( hrs / min ) = hrs

hrs
------------------------
Convert sec to hrs
hrs
The 1st distance is:
km
-----------------------
Convert sec to hrs

The 2nd distance is:
km
-------------------
( total distance ) / ( total time ) =





The average speed is 1 km/hr
----------------------------
Check:
at average speed of 1 km/hr, how
many km in 15 sec?

km




OK


Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
a car travels from a to b in 10 sec. with a speed of 54 km per hr and return with a speed of 96 km per hr in 5 sec. what is the average speed
=====================
If the distance is the same, the numbers are not right.
---
10*54 <> 5*96

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