Question

6. A rectangular field is 72 m by 58 m. Amar walks round it at the rate of 3 km per hour. What time will he take in taking 2 rounds. ​

Answer 1

Answer:

Step-by-step explanation:m

72m divided by 58 =    72/58 = 36\29x3 =           4x2=8

ans= 8

Answer 2

$\sf \rm{Dimension \: of \: rectangular \: field  \: =72cm \: by \: 58}</p><p></p><p>$

${\red \sf \rm{Perimeter \: of \: rectangular \: field \:  =2(l+b)}}$

$\sf \rm = 2 \times (72 + 58)$

$\sf \rm = 2 \times 138 = 260$

$\sf \red{The \: distance \: took \: by \: Amar \: in \: taking \: two \: rounds  \: =2×260m }$

$\sf\pink{ = 520 \: m}$

$\sf{\boxed{Speed \: of \: Amar \: = \frac{3km}{hr}}}$

$\sf \frac{3 \times 1000}{3000} = \: \frac{m}{s}$

$\sf \frac{5}{6} = \frac{m}{s}$

$\sf{ \green{Total \: times \: taken  \: = \frac{distance}{speed} }}$

$\sf \frac{520}{ \frac{5}{6} } = 520 \times \frac{6}{5}$

$\sf = 104 \times \frac{6}{60} \: min$

$\sf{ \blue{ = 10.4min}}$

hope its help u