The length of the rectangle is 5/8 of its width. Find the sides of a rectangle if its area is 40 cm2.

To find the area, you need to multiply the length by the width. however, the area is already known. Let’s display the length and width. Let’s say width = “x”, then length = “5 / 8x”.

Let’s draw up an equation based on the area formula:

x * 5 / 8x = 40;

5 / 8x ^ 2 = 40;

x ^ 2 = 40: 5/8;

x ^ 2 = 40 * 8/5;

x ^ 2 = 40: 5 * 8 = 64;

x = 8 (cm) – width.

Length – 5/8 * 8 = 5 (cm).

Answer: width – 8 cm, length – 5 cm.




One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.

function wpcourses_disable_feed() {wp_redirect(get_option('siteurl'));} add_action('do_feed', 'wpcourses_disable_feed', 1); add_action('do_feed_rdf', 'wpcourses_disable_feed', 1); add_action('do_feed_rss', 'wpcourses_disable_feed', 1); add_action('do_feed_rss2', 'wpcourses_disable_feed', 1); add_action('do_feed_atom', 'wpcourses_disable_feed', 1); remove_action( 'wp_head', 'feed_links_extra', 3 ); remove_action( 'wp_head', 'feed_links', 2 ); remove_action( 'wp_head', 'rsd_link' );