Question

a rectangular field is 72 by 58 KM walk around it at the rate of 3 km per hour what time he will take in take in taking 2 rounds​

Answer 1

first we need to find the distance and then time.

$distance = 2(perimeter \: of \: rectangle) \\ perimeter \: of \: rectangle = 2(l + b) \\ = 2(72 + 58)km = 2(130)km \\ = 260km \\ now \: we \: have \: the \: formula \: that \: time = \frac{distance}{speed} \\speed \: given =3kmph \\ time \: taken = \frac{2 \times 260km}{3kmph} \\ = \frac{520}{3} h \\ = 173.33hours$

the time taken is 173.33 hours or which is 173+1/3 hours=173 hours 20 minutes