Hello!!!!!!!!!!!
Can anyone help me understand a question:-
After months of constant practice, Tom manages to improve his time for the 1500m race by 10%. What is the pecentage change in his speed.
I am not sure about its answer but is it 10%.
Thank You,
Mathematician.
Hello, Mathematician!
Glaysher is absolutely correct!
If you're desperate, insert some numbers and baby-talk through it.
Tom manages to improve his time for the 1500m race by 10%.
What is the pecentage change in his speed?
Suppose Tom took 300 seconds to run 1500 meters.
. . His speed was: m/sec.
I assume that a "10% improvement" means he takes only 90% of the time now.
. . So he takes only: seconds.
His new speed is: m/sec.
His speed has increased by: m/sec.
How does this compare with his original speed?
We have: . . . see?