{"id":18642,"date":"2026-05-03T19:34:57","date_gmt":"2026-05-03T13:34:57","guid":{"rendered":"https:\/\/mcqacademy.com\/en\/mcq\/use-a-perimeter-formula-to-find-a-variable-5\/"},"modified":"2026-05-03T19:34:57","modified_gmt":"2026-05-03T13:34:57","slug":"use-a-perimeter-formula-to-find-a-variable-5","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/en\/mcq\/use-a-perimeter-formula-to-find-a-variable-5\/","title":{"rendered":"Use a Perimeter Formula to Find a Variable"},"content":{"rendered":"<p>A rectangle has length 16 cm and width w cm. If its perimeter is 42 cm, what is w?<\/p>\n\n<ul class=\"quiz-options wp-block-list\">\n<li>21<\/li>\n<li>16<\/li>\n<li>5<\/li>\n<li>6<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[2705],"subject":[1425],"education_level":[1893,2494,2495],"class_list":["post-18642","mcq","type-mcq","status-publish","hentry","topic-algebra","subject-mathematics","education_level-grade-5","education_level-grade-6","education_level-grade-7"],"mcq_note":"Use P = 2(l+w). Substitute: 42=2(16+w). Divide by 2: 21=16+w. So w=21-16=5.","mcq_options":[{"right":"no","answer":"21"},{"right":"no","answer":"16"},{"right":"yes","answer":"5"},{"right":"no","answer":"6"}],"multi_answers":"no","subject_terms":[{"id":1425,"title":"Mathematics","slug":"mathematics"}],"topic_terms":[{"id":2705,"title":"Algebra","slug":"algebra"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq\/18642","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/comments?post=18642"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/media?parent=18642"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/topic?post=18642"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/subject?post=18642"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/education_level?post=18642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}