Two circular cylinders of equal volumes have their heights in ratio 1 is to 2 find the ratio of their radii.

Let the radio be r1 and r2.
Let the height of 1st cylinder=h
Let the height of 2nd cylinder=2h.

Comments

Post a Comment

Thanks for your suggestions

Popular posts from this blog

Name the largest Dam of India..

Image
                                     By :- sumit kr. As we know that there is a big and important place of questions related to general knowledge in competition exams. So this post is also about to one of these topics our today's topic is dams of India. •what is Dam? A wall build across a river to hold back the water and form lake behind it known as Dam. •what is the main aim behind building a dam?     Dams are built for more than one purpose like:-.                                                 •Fishing •to generate hydroelectricity •water supply for irrigation •flood control •fulfill the need of water for drinking. •providing open water for navigation e.t.c......  some disadvantages of dam. •it have a harmful effect on marine life. •It  resul...
Read more

know about your diet.

Image
                                                   By Sumit kr.  Hello friends welcome to your own blog Full Educational. In this period of endemic health is the biggest need of present life.So, today I came across to you with a lot of information about nutrients present in our daily life food items and how can they help us to live fit and healthy . 1.Tomato It is well known vegetable that we eat. Tomato rich products may help to reduce the risk of pancreatic cancer, tomatoes are also powerfull blood purifier and clear up urinary tract infection. They are high source of vitamin C and vitamin A which improves eye sight. They have high concentration of  fibres,  that's why it is freely used by weight watchers. 2.Orange Oranges  are an excellent source of  vitamin C  and  vitamin C 12 is very  ...
Read more

Solution of 1st exercise chapter surface area and volume of class 9 NCERT book

Q.1. A piastic box 1.5 m long. 1.25 m wide and 65 cm deep is to be made. It is to be open 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 1 m cost Rs 20. Sol.  Here, length - 1.5 m, Breadth- 1.25 m, Height - 65 cm - 0.65 m. Since the box is open at the top, it has only five faces. (i) So, surface area of the box - Ib + 2(bh + hl) 1.5 x 1.25 m? + 2 (1.25 x 0.65 + 0.65 x 1.5) m^2 = 1.875 + 2 (1.7875) m^2 = (1.875 + 3.575) m2 - 5.45 m^2 Hence, 5.45 m^2of sheet is required Ans. (ii) Cost of 1 m^2of the sheet = Rs 20 . cost of 5.15 m^2 of the sheet = Rs 20 x 5.15 m^2 = Rs 109 Ans. Q.2. The length, hreadth and height of a room are 5 m,3 m and 3m. respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs 37.50 per m^2. Sol. Here, l = 5 m, b = 4 m, h = 3 m Surface area of the walls of the room and the c...
Read more