The length of the base diameter of a wooden toy of conical shape is 10 cm. The expenditure for polishing whole surfaces of the toy at the rate of Rs. 2.10 perm² is Rs. 429. Calculate the height of the toy and also determine the quantity of wood which is required to make the toy.​

The length of the base diameter of a wooden toy of conical shape uis 10 cm . The expenditure for polishing whole surfaces of the toy at the raye of rupees 2.10 per square - metre is rupees 429. Calculate the height of the toy. Also determine the quantity of wood which is required to make the toy.

The external diameter of the base of a right circular cone - shaped wooden toy is 10 cm. The expenditure of colouring the total surface area on the outside of it at the rate of rs 0.07 per sq-cm is rs 19.80 Find the slant height of the toy.

External diameter of a hemispherical wooden pot is 10 cm and its thickness is 1 cm. Calculate the cost of colouring the pot at the rate of Rs 10 per square cm.

The quantity of iron - sheet to make a boy a of right circular conical shape is 75(3)/(7) sq-m. if the slant height of it 5 m, then calculate the volume of air in the boya and its height. Determine of the expenditure to colour the whole surface of the boya at the rate of rupees 2.80 per square - metres. [The width of the iron - sheet not to be considered while calculating.]

The external diameter of a conical - coronet made off thermocol is 21 cm is length . To wrap up the outer surface of the coronet with foil , the expenditure will be rupees 57.75 at the rate of 10p per - m^2 . Calculate the height and slant height of the coronet

A toy is made in the form of hemisphere sumounted by a right cone whose circular base is joined with the plane surface of the hemisphere . The radius of the base of the cone is 7 cm and its volume is 3/2 of the hemisphere . Calculate the height of the cone and the surface area of the toy correct to 2 places of decimal (Take pi= 3 1/7 )

Both ends of right circular cylindrical tank are semicircular . If diameter of the tank be 1.4 metre and length be 5 metre , then what will be the expenditure of colouring the external surface of the tank at the rate of Rs 10 per square - metre ?

A toy is in form of a cone mounted on a hemisphere on the same diameter . The diameter of the base and the height of the cone are 6 cm and 4 cm respectively. Determine the surface area of the toy . [use pi= 3.14 ]

The vertical height of a conical text tent is 10 metre and diameter of base is 15 metre. If the cost of canvas per sq.m. is RS 3.50, find the cos tof canvas to make the tent.