Page 1 : EXERCISE 13.6, , Assume, , , , 2 esd evs, , , , “The circumference ofthe base ofa cylindrical vessel is 132m and its height is 25 em,, , ‘How many litres of water can it hold? (1000 em’ = 11), , 2. The inner diameter of a cylindrical wooden pipe is 24 cm and its outer diameter is, ‘28cm. The length ofthe pipe is 35 em. Find the mass of the pipe if 1 em’ of wood has, amassof 0.68., , 3. A softdrink is available in two packs —() atin can with a rectangular base of length, ‘Sem and width 4 em, having a height of 15 cm and (i aplastic cylinder with circular, ‘base of diameter 7 cm and height 10cm. Which container has greater capacity and by, hhow much?, , 4. If the lateral surface of a cylinder is 94.2 cm* and its height is $ em, then find, (radiusofitsbase (its volume. (Use x=3.14), , , , ACE AREAS AND VOLUMES 231, , , , S. It costs £2200 to paint the inner curved surface ofa cylindrical vessel 10 m deep. If, the cost of painting is tthe rate of € 20 per m* find, (inner curved surface area ofthe vessel,, (Gi) radius of the base,, (Gi) capacity of the vessel., , 6 The capacity of a closed cylindrical vessel of height 1 m is 15.4 litres. How many, ‘square metres of metal sheet would be needed to make i, , 7. Allead pencil consists of a cylinder of wood with asolid cylinder of graphite filled in, the interior. The diameter of the pencil is 7 mm and the diameter ofthe graphite is | mm,, If the length of the pencil is 14 cm, find the volume of the wood and that of the, raphite, , & A patientin a hospital is given soup daly in a cylindrical bowl of diameter7 cm. Ifthe, ‘bowls filled with soup to aheight of 4cm, how much soup the hospital has to prepare, daily to serve 250 patients?