Скачать или смотреть Surface Area And Volume Class 9 Introduction | Chapter 13 Maths Class 9 Exercise 13.1 (Part 1)

Surface Area And Volume Class 9 NCERT
Maths Class 9 Surface Area And Volume Solutions
Surface Area And Volume Class 9 Chapter 13 Part - 1
NCERT Maths Class 9 Chapter 13 Part 1
9th Class Math Chapter 13 Solutions
Surface Area And Volume
We will learn about various geometrical shape, area and their volume. Likewise cube, cuboid, cylinder, cone, sphere, hemisphere, slant height, latent surface Area, total surface area, introduction and Exercise.
0:00 GYAN VIHARA INTRO
0:05 Surface Area of a Cuboid and a Cube, lateral surface area ,total surface area
8:49 EXERCISE 13.1
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 1M^2 costs RS. 20.
3. The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four
walls at the rate of ` 10 per m^ is ` 15000, find the height of the hall. [Hint : Area of the four walls = Lateral surface area.]
5. A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm
wide and 8 cm high.
(i) Which box has the greater lateral surface area and by how much?
(ii) Which box has the smaller total surface area and by how much?
7. Shanti Sweets Stall was placing an order for making cardboard boxes for packing their sweets. Two sizes of boxes were required. The bigger of dimensions 25 cm × 20 cm × 5 cm and the smaller of dimensions 15 cm × 12 cm × 5 cm. For all the overlaps, 5% of the total surface area is required extra. If the cost of the cardboard is RS. 4 for 1000 cm^2, find the cost of cardboard required for supplying 250 boxes of each kind.
8. Parveen wanted to make a temporary shelter for her car, by making a box-like structure
with tarpaulin that covers all the four sides and the top of the car (with the front face
as a flap which can be rolled up). Assuming that the stitching margins are very small,
and therefore negligible, how much tarpaulin would be required to make the shelter of
height 2.5 m, with base dimensions 4 m × 3 m?

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गणित हिंदी ऑनलाइन ट्यूटोरियल
NCERT मैथ्स कक्षा 9 अध्याय 13
हम विभिन्न ज्यामितीय आकार, क्षेत्र और उनकी मात्रा के बारे में जानेंगे। इसी तरह घन, घनाकार, सिलेंडर, शंकु, गोला, गोलार्ध, तिरछी ऊंचाई, अव्यक्त सतह क्षेत्र, कुल सतह क्षेत्र, परिचय और व्यायाम।

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