Question

Arun could run one mile in 10 minutes last year. He can run a mile in 8 Minutes This year. By What percentage did his timing improve?

Answer 1

Answer:

20% his timing is improving

Answer 2

$Given \: time \: taken \: to \: run \: 1 \:mile\\last \:year(t) = 10 \: minutes$

$Time \: taken \: to \: run \: 1 \:mile\\this\:year = 8 \: minutes$

$\blue {Difference \: in \: time (D)} \\= 10 - 8 \\= 2 \: minutes$

$\red{ Improvement \: in \: timing } \\= \frac{ D}{t} \times 100 \\= \frac{2}{10} \times 100 \\= 2 \times 10 \\= 20$

Therefore.,

$\red{ Improvement \: in \: timing } \green { = 20\% }$

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