9th class maths chapter 13 exercise 13.6
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How many litres of milk can a hemispherical bowl of diameter 10. Solution: Given, two persons could fit new windows in house in 3 days i One man fell ill before work started. A bag of grain contains 2. Find the depth of the drain let. The height of a cone is 15 cm. Chapter 13 includes all types of exercise problems from basic to advance level question to make students prepare for the board and competitive examinations.

If the cost of painting is at the rate of 20 per m 2, find i inner curved surface area of the vessel, ii radius of the base, iii capacity of the vessel. Find the mass of the pipe, if 1 cm3 of wood has a mass of 0. A hemispherical tank is made up of an iron sheet 1 cm thick. If the diameter of the base is 28 cm, find i Height of the cone. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to serve 250 patients? If the inner radius is 1 m, then find the volume of the iron used to make the tank. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. As 20 cm will be wasted, therefore, the effective length will be l- 0.

Find i surface area of the sphere, ii curved surface area of the cylinder, iii ratio of the areas obtained in i and ii. A soft drink is available in two packs i a tin can with a rectangular base of length 5 cm and width 4 cm, having height of 15 cm ii a plastic cylinder with circular base of diameter 7 cm and height 10 cm. How many square meters of metal sheet would be needed to make it? Ans : Matchbox is a cuboid having its length j , breadth b , height h as 4 cm, 2. The floor of a rectangular hall has a perimeter 250 m. Note : If an object is solid, then the space occupied by such an object is measured, and is termed the Volume of the object. The inner diameter of a cylindrical wooden pipe is 24 cm and its outer diameter is 28 cm.

Solution The urn contains 5 red and 5 black balls. Each penholder was to be of radius 3 cm and height 10. . Find the cost of whitewashing its curved surface at the rate of Rs. The paint in a certain container is sufficient to paint an area equal to 9. Find the area of the sheet required to make 10 such caps.

Can you draw a circle on a paper? Also, find the ratio between their surface areas. Find i radius of the base and ii total surface area of the cone. For other questions please visit to or or or or or or or or go for Solutions. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to serve 250 patients? The capacity of a cuboidal tank is 50000 litres of water. 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.

If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite. For other questions please visit to or or or or or or or or go for Solutions. Find i the lateral or curved surface area of a closed cylindrical petrol storage tank that is 4. Solution Let X and Y be the respective events that a person has a disease and a person has no disease. All the items are put into one stockpile and then one item is chosen at random from this and is found to be defective.

Since ours is more or less a one man army we are working towards providing answers to questions available at our website. How many liters of water can it hold? For other questions please visit to or or or or or or or or go for Solutions. A soft drink is available in two packs i a tin can with a rectangular base of length 5 cm and width 4 cm, having a height of 15 cm. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to serve 250 patients? If there were 35 competitors, how much cardboard was required to be bought for the competition? How many litres of water can it hold? Visit to main page or move to of the page. If you are a student of class 9 who is using to study Maths, then you must come across Chapter 13 Surface area and volumes. A soft drink is available in two packs — i a tin can with a rectangular base of length 5 cm and width 4 cm, having a height of 15 cm and ii a plastic cylinder with circular base of diameter 7 cm and height 10 cm. So, using the same argument as for a cuboid, we can see that the volume of a cylinder can be obtained 13.

Solution Let X be the event that the outcome on the die is 5 or 6 and Y be the event that the outcome on the die is 1, 2, 3, or 4. We will make it correct as soon as possible. It costs 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. The floor of the room is not to be white-washed. It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet. Find i radius of the base and ii total surface area of the cone.