Kayla plans to swim 2 laps per minute until she swims 12 laps. She figures this will take 16 minute. Which is NOT a reason why this conclusion is wrong?
this may because Kayla will not swim 2 laps every minute. The 16 minutes may be reached because she may have swam only one lap per minute and then gradually made it up to 2 per minute
Answer:
It really takes her 6 min
Step-by-step explanation:
We can solve this problem easily using cross-multiplication. If she swims 2 laps per minute, then how many minutes will it take her to swim 12 laps?
So in order to use cross-multiplication, let's convert the word problem into ratios:
\(\frac{2laps}{12laps}=\frac{1min}{x}\)
Now, we only need to solve the previous equation for x.
Hence, isolating x, we get:
\(x=\frac{12laps}{2laps} *1min=6*1min=6min\)