Question

. The area of a square plot is 4900 m². If a man walks around it with a speed of 4 km per
hour, then how much time will he take to go round it once.​

Answer 1

37.5 minute is the answer

Answer 2

Answer:

Area of the given square plot = 4900m²

$side \: of \: the \: square \: plot \: = \sqrt{area} = \sqrt{4900 {m}^{2} } = 70m$

perimeter of the square = 4 × side = (4 × 70)m = 280m

Distance walked by the man = 280m

$speed \: of \: walking \: \\ = 4km/hour \: = 4 \times \frac{5}{18} m/s \: = \frac{10}{9} m/s$

$time \: taken \: = \frac{distance}{speed} = \frac{280m}{ \frac{10}{9} } m/s \\ \\ = \frac{280 \times 9}{10} = 252s \: = \frac{252}{60} minutes \\ \\ 4minutes \: 12 \: seconds$

✅ hence the man will take 4 minutes 12 seconds to go around the square plot once.

⛄ hope it helps you