Question

19. The area of a square feld is 60025 m A man cycles along its boundary at 18 km/h. In how
much time will be return to the starting point?
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Answer 1

so side will be

$\sqrt{60025}$

now side=245

so peremeter becomes 4×side

now peremeter is 4×245=980m

speed=5m/sec

time taken =980/5

=196sec