2<\/sup> \nNumber of tiles = \\(\\frac{\\text { Area of the floor }}{\\text { Area of one tile }}\\) \n= \\(\\frac{1080 \\times 1000}{24}\\) = 45 \u00d7 1000 = 45000 tiles<\/p>\nQuestion 5. \nAn ant is moving around a few food pieces of different shapes scattered on the floor. For which food-piece would the ant have to take a longer round? Remember, circumference of a circle can be obtained by using the expression c = 2\u03c0r, where r is the radius of the circle. \n \nAnswer: \n(a) Radius of the semicircle = \\(\\frac{2.8}{2}\\) = 1.4 cm \nPerimeter of the semicircle = \\(\\frac{2 \\pi \\mathrm{r}}{2}\\) + 2r \n= \\(\\frac{22}{7}\\) \u00d7 1.4 + 2 \u00d7 1.4 = 4.4 + 2.8cm \n= 7.2 cm<\/p>\n
(b) Perimeter of the semicircular part \n= \\(\\frac{1}{2}\\) \u00d7 2\u03c0r = \u03c0r = \\(\\frac{22}{7}\\) \u00d7 1.4 = 4.4 cm \nPerimeter of the rectangular part \n= 1.5 + 2.8 + 15 cm = 5.8 cm \nPerimeter of the given diagram \n= 4.4 cm + 5.8 cm = 10.2 cm<\/p>\n
(c) Perimeter of the semicircular part \n= \\(\\frac{2 \\pi r}{2}\\) \u03c0r = \u03c0r = \\(\\frac{22}{7}\\) \u00d7 1.4 cm = 4.4 cm \nPerimeter of the given diagram \n= (4.4 + 2 + 2) cm = 8.4 cm \n\u2234 7.2 cm < 8.4cm < 10.2 cm \nAnt has to take a longer round for (b).<\/p>\n","protected":false},"excerpt":{"rendered":"
These NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.1 Questions and Answers are prepared by our highly skilled subject experts. NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Exercise 11.1 Question 1. A square and a rectangular field with measurements as given in the figure have the same perimeter. Which field …<\/p>\n
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.1<\/span> Read More »<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","spay_email":""},"categories":[7],"tags":[],"yoast_head":"\nNCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.1 - MCQ Questions<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n