Question

The area of a 65 m long rectangular plot is 3575 sq m. If a girl runs around the plot at the rate
4 km/hr, how long will she take to complete 4 rounds of the plot?​

Answer 1

Step-by-step explanation:

$given : area = 3575 {m}^{2}$

$length = 65m$

$but \: area = l \times b$

$therefore \: breadth = \frac{area}{length}$

$breadth = \frac{3575}{65} = 55m$

$perimeter = 2(l + b)$

$p = 2(65 + 55) = 2 \times 120 = 240m$

$4 rounds=4\times 240=960m$

$speed= 4kmph=4000metresph$

$time= \frac{960}{4000}=0.24 hrs or 14.4 min$