Question

only 18 no
$ans \: 56 \: second$
please do it fast

i will you as brainlist ​

Answer 1

he takes 1 hr to run 9km
then he'll take 1 minute to run 9/60km
hence he'll take 1 minute to run 0.15km=150m


hence he'll take 150/60 sec
=>2.5 sec

Answer 2

Hey friend here is the solution for this question.....

velocity = 9 km/hr

or

$9 \times 5 \div 18 = 2.5 \frac{m}{s}$

time he will take to run around a square Field=

$\frac{perimeter \: of \: field}{speed}$

$= \frac{(4 \times 35)}{2.5} = 56 \: seconds$

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