Question 1159341

hello, how are you? i need a help please :
Driving at a speed of 40 km / h, you need half an hour to reach the home. With what speed do you have to drive to get home in 20 minutes?

<pre>She's WRONG, WRONG, WRONG, as usual! Besides, she makes this SIMPLE problem so, so COMPLEX!!
At 40 km/h, and needing {{{1/2}}} hour to get home, it goes without saying/is OBVIOUS that the distance to home is: {{{matrix(1,4, 40 * (1/2), "=", 20, km)}}}
With distance home being 20 km, speed to get there in {{{matrix(1,5, 20, minutes, or, 1/3, hour)}}} is: {{{highlight_green(matrix(1,5, 20/(1/3), "=", 20(3), "=", highlight(matrix(1,2, 60, "km/h"))))}}}
That's how SIMPLE this TRAVEL problem is!