{"id":9402,"date":"2021-04-07T17:25:31","date_gmt":"2021-04-07T11:55:31","guid":{"rendered":"https:\/\/apboardsolutions.guru\/?p=9402"},"modified":"2021-09-15T16:01:49","modified_gmt":"2021-09-15T10:31:49","slug":"ap-board-7th-class-maths-solutions-chapter-1-ex-7","status":"publish","type":"post","link":"https:\/\/apboardsolutions.guru\/ap-board-7th-class-maths-solutions-chapter-1-ex-7\/","title":{"rendered":"AP Board 7th Class Maths Solutions Chapter 1 Integers Ex 7"},"content":{"rendered":"

AP State Syllabus AP Board 7th Class Maths Solutions<\/a> Chapter 1 Integers Ex 7 Textbook Questions and Answers.<\/p>\n

AP State Syllabus 7th Class Maths Solutions 1st Lesson Integers Exercise 7<\/h2>\n

\"AP<\/p>\n

Question 1.
\nIn a class test containing 15 questions, 4 marks are given for every correct answer and (-2) marks are given for every incorrect answer. (i) I3harathi attempts all questions but only 9 answers are correct. What is her total score\u2019? (ii) One of her friends Hema answers only 5 questions correct. What will be her total score?
\nSolution:
\ni) Bharathi\u2019s score = 4 \u00d7 Number of correct answers + (-2) \u00d7 Number of wrong answers
\n=4 \u00d7 9 + (-2) \u00d7 6 = 36 + (-12) = 24
\nii) Hema\u2019s score = 4 \u00d7 (5) + (-2) \u00d7 10 = 20 + (-20) = 0<\/p>\n

Question 2.
\nA cement company earns a profit of \u20b9 9 per bag of white cement sold and a loss of \u20b9 5 per bag of grey cement sold.
\n(i) The company sells 7000 bags of white cement and 6000 bags of grey cement in a month. What is its profit or loss?
\n(ii) What is the number of white cement bags it must sell to have neither profit nor loss, ifthe number of grey bags sold is 5400.
\nSolution:
\ni) Profit on 7000 white cement bags = 9 \u00d7 7000 = \u20b9 63,000
\nLoss on 6000 grey cement bags = 5 \u00d7 6000 = \u20b9 30,000
\nNet profit or loss = 63,000 – 30,000 = \u20b9 33,000 profit
\nii) When there is no loss then
\nProfit on white cement bags = loss on grey cement bags
\nLoss on grey cement bags = 5 \u00d7 5400 = \u20b9 27,000
\n\u2234 Number of white cement bags = \\(\\frac{27,000}{9}\\) = 3,000<\/p>\n

Question 3.
\nThe temperature at 12 noon was 10\u00b0C above zero. \u00a1fit decreases at the rate of 2\u00b0C per hour until midnight. at what time would the temperature be 8\u00b0C below zero? What would be the temperature at midnight\u2019?
\nSolution:
\nThe temperature at 12 noon = 10\u00b0C
\nGiven temperature = 8\u00b0C below zero = – 8\u00b0C
\nDifference between the temperature = 10 – (- 8\u00b0) = 18\u00b0C
\n\u2234 Time lasted = 18 + 2 = 9 hours
\ni.e., at 9 o\u2019 clock the temperature would be – 8C
\nAt mid-night the temperature 10 + 12(-2) = 10 + (- 24) = – 14\u00b0C<\/p>\n

Question 4.
\nIn a class test (+3) marks are given for every correct answer and (-2) marks are given for every incorrect answer and no marks for not attempting any question.
\n(i) Radhika scored 20 marks. if she has got 12 correct answers, how many questions has she attempted incorrectly?
\n(ii) Mohini scores (-5) marks in this test, though she has got 7 correct answers.
\nHow many questions has she attempted incorrectly?
\nSolution:
\ni) Let the no. of incorrect answers = x
\nSo score = 3 \u00d7 No. of correct answers + (-2) No. of incorrect answers
\nRadhika score = 20 marks
\n\u21d2 20 = 3 \u00d7 12 + (-2) x \u21d2 20 = 36 – 2x \u21d2 2x = 36 – 20 \u21d2 x = 16\/2 = 8
\n\u2234 No. of incorrect questions = 8<\/p>\n

ii) Mohini scores = -5
\nMarks for correct answers = 7 \u00d7 3 = 21
\nMarks for incorrect answers = -5-21 = -26
\n\u2234 Number of incorrect answers = -26 \u00f7 2 = -13<\/p>\n

Question 5.
\nAn elevator descends into a mine shaft at the rate of 6 meters per minute. If the decent starts from 10 rn above the ground level, how long will it take to reach -350 m.
\nSolution:
\nTotal length to be descend = -350 – 10 = -360 m
\nRate of the speed of the elevator 6m per minute
\nTotal time to descend = \\(\\frac{360}{6}\\) = 60 minutes = 1 hour<\/p>\n","protected":false},"excerpt":{"rendered":"

AP State Syllabus AP Board 7th Class Maths Solutions Chapter 1 Integers Ex 7 Textbook Questions and Answers. AP State Syllabus 7th Class Maths Solutions 1st Lesson Integers Exercise 7 Question 1. In a class test containing 15 questions, 4 marks are given for every correct answer and (-2) marks are given for every incorrect …<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[9],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/posts\/9402"}],"collection":[{"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/comments?post=9402"}],"version-history":[{"count":0,"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/posts\/9402\/revisions"}],"wp:attachment":[{"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/media?parent=9402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/categories?post=9402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/apboardsolutions.guru\/wp-json\/wp\/v2\/tags?post=9402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}