[10/12, 8:58 PM] Chulu: Ex 13.1 Class 9 Maths Question 1. A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine (i) The area of the sheet required for making the box. (ii) The cost of sheet for it, if a sheet measuring 1m2 costs ₹20. Solution: (i) Here, length (l) = 1.5 m, bread th(b) = 1 .25 m and height (h) = 65 cm = 65100 m = 0.65 m NCERT Solutions for Class 9 Maths Chapter 13 Surface Areas and Volumes Ex 13.1 Q1 ∵ It is open from the top. ∴ Its surface area = [Lateral surface area] + [Base area] = [2(1 + b)h] + [lb] = [2(1.50 + 1.25)0.65] m2 + [1.50 x 1.25] m2 = [2 x 2.75 x 0.65] m2 + [1.875] m2 = 3.575 m2+ 1.875 m2 = 5.45 m2 ∴ Area of the sheet required for making the box = 5.45 m2 (ii) Cost of 1 m2 sheet = Rs. 20 Cost of 5.45 m2 sheet = Rs. (20 x 5.45) = Rs. 109 Hence, cost of the required sheet = Rs. 109 [10/12, 8:59 PM] Chulu: Ex 13.1 Class 9 Maths Question 2. The length, breadth and height of a room are 5 m, 4 m and 3 m, respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of ₹17.50 per m2. Solution: Length of the room (l) = 5 m Breadth of the room (b) = 4 m Height of the room (h) = 3 m The room is like a cuboid whose four walls (lateral surface) and ceiling are to be white washed. ∴ Area for white washing = [Lateral surface area] + [Area of the ceiling] = [2(l + b)h] + [l x b] = [2(5 + 4) x 3] m2 + [5 x 4] m2 = 54 m2 + 20 m2 = 74 m2 Cost of white washing for 1 m2 area = Rs. 7.50 ∴ Cost of white washing for 74 m2 area = Rs. (7.50 x 74) = Rs. 555 Thus, the required cost of white washing = Rs. 555
When her son dies, Kisa Gotami goes from house to house? What does she ask for? Does she get it? Why not? Answer: After the death of her only son, Kisa Gotami was overcome with grief. She carried the dead body of her son in her arms and went from door to door asking for medicine to cure her child, but nobody could provide any medicine. For there is no such medicine available which can bring a dead person back to life. Question 2. Kisa Gotami again goes from house to house after she speaks with the Buddha. What does she ask for? Does she get it? Why not? Answer: Gautama Buddha asks Kisa to bring a handful of mustard seeds from a house where death had never knocked at the door. Kisa Gotami went from door to door, but couldn’t find a single house where death had not taken a beloved away. She could not get it as death is ineritable and anyone who is born is bound to die one day. More Resources for CBSE Class 10 NCERT SolutionsNCERT Solutions for Class 10 ScienceNCERT Solutions for Class 10 MathsNCERT Solutions for Class 10 SocialNCERT Solutions for Class 10 EnglishNCERT Solutions for Class 10 HindiNCERT Solutions for Class 10 SanskritNCERT Solutions for Class 10 Foundation of ITRD Sharma Class 10 Solutions Question 3. What does Kisa Gotami understand the second time that she failed to understand the first time? Was this what Buddha wanted her to understand? Answer: After failing to procure a handful of mustard seeds from a house where death had never knocked at the door, she sat down by the roadside feeling helpless. She saw the lights of the city that flickered and were extinguished. At last, it was darkness everywhere. She realised that death was common to all and she was being selfish in her grief. Yes, this is what Buddha wanted her to understand, that everyone who is born has to die one day. Question 4. Why do you think Kisa Gotami understood this only the second time? In what way did Buddha change her understanding? Answer: Earlier, she could see only her grief. When she went from door to door the second time, she understood that everyone was dealing the with the loss of a beloved one. There was not a single house in the town, where death had not taken a father, a mother, a sister, a brother, son or a daughter. Everyone, at some point or the other, have experienced the death of their loved ones. Gautama Buddha helped her to understand all this, as he told her to bring a handful of mustard seeds from a house where death had never knocked at the door. This way she got aware that death is common to all human beings. Question 5. How do you usually understand the idea of selfishness? Do you agree with Kisa Gotami that she was being selfish in her grief? Answer: A selfish person is one who only thinks about himself or herself, and to some extent Kisa Gotami was being selfish because we are humans and it is natural for us to die. We do not easily accept the death of our loved ones. Same has happened with Kisa Gotami. As it was her only child, she did not want him to die finally went to Buddha to ask for help.
