Please solve question 7 and 11

Please solve question 7 and 11 T ne difference between outside and inside surface of a cylindrical metallic pipe 14 cm long is 44 sq. cm. If the pipe is made of 99 cubic cm of metal, find the outer and inner radii of the pipe. 2 cm A milk tanker cylindrical in shape having diameter 2 metres an length 4.2 metres supplies milk to the two booths in the ratio 3 : 2. One of the milk booths has a rectangular vessel having base areas 3.96 sq. m and the other has a cylindrical vessel having diameter 2 metres. Find the level of milk in each of the two vessels. He ht of milk in rectangular vessels 2m ; Height of milk in cylindrical vessel = 1.68 m 10. 11. The diameter of a roller 120 m long is 84 cm. If it takes 500 complete revolutions to level a play ground, find the cost of levelling it at the rate of Rs. 2 per sq. metre. Rs. 3168 A conical tent is required to accommodate 7 persons. Each person requires 22 sq. dm. of space on the ground and 176 cu dm of air to breadth. Find the vertical height and the slant 24 dm, 26 dm height Of the ten. The internal and external diameters of a hollow hemispherical vessel are 25 cm and 24 cm respectively. The cost to paint 1 crn2 of the surface is Rs. 0.05. Find the total cost of paint RS. 96.29 the Vessel all over. (Use = 2217). A semi circular thin sheet of metal of diameter 28 cm is bent and an open conical cup is 622.3 cm' made. Find the capacity of the cup. Water flows out through a circular pipe whose internal diameter is 2 cm at the rate of 6 rn/s into a cylindrical tank. If the radius of the base of the tank is 60 cm, by how much will the level of water rise in half an hour ? A metallic cylinder has radius 3 cm an height 5 cm. it is made of a metal A. To reduce its weight, a conical hole is drilled in the cylinder as shown and it is completely filled with a lighter metal B. The conical hole has a radius of 3/2 cm and its depth is 8/9 cm. Calculate the ratio of the volume of the metal A to the volurne of the metal B in the solid. 133: 2 A Cone is divided into two parts by drawing a plane through the mld-point of its axis, parallel to its base. Compare thc vo'umes of two part.