Mathematics
The internal and external diameters of a hollow hemispherical vessel are 14 cm and 21 cm respectively. The cost of silver plating of 1 cm2 of its surface is ₹ 32. Find the total cost of silver plating the vessel all over.
Related Questions
P and Q are centers of a circle of radii 9 cm and 2 cm respectively. PQ = 17 cm. R is the centre of a circle of radius x cm which touches the above circles externally. Given that ∠PRQ = 90°, write an equation in x and solve it.
Use ruler and a pair of compasses only in this question :
(i) Draw a circle on AB = 6.4 cm as diameter.
(ii) Construct another circle of radius 2.5 cm to touch the circle in (i) above and the diameter AB produced.