CBSE Class 10 Maths (Standard) 2020 · Paper 30/3/1 · Question 24
Read the following passage and answer the questions given at the end: Students of Class XII presented a gift to their school in the form of an electric lamp in the shape of a glass hemispherical base surmounted by a metallic cylindrical top of same radius cm and height cm. The top was silver coated and the glass surface was painted red.
- (i)What is the cost of silver coating the top at the rate of ₹ 5 per 100 cm?[2]
- (ii)What is the surface area of glass to be painted red?[2]
Answer
(i) Cost of silver coating ₹ (for cm). (ii) Red-painted glass surface area cm.
🔒 Step-by-step solution
Sign up free to see every step of how it is worked out.
From the board paper
More questions from Surface Areas and Volumes
Class 10 Maths — every question with an expert-verified, step-by-step solution.
- Q1 2 cubes each of volume 64 cm^3 are joined end to end. Find the su…
- Q2 A vessel is in the form of a hollow hemisphere mounted by a hollo…
- Q3 A toy is in the form of a cone of radius 3.5 cm mounted on a hemi…
- Q4 A cubical block of side 7 cm is surmounted by a hemisphere. What…
- Q5 A hemispherical depression is cut out from one face of a cubical woo…
- Q6 A medicine capsule is in the shape of a cylinder with two hemisphere…
- Q7 A tent is in the shape of a cylinder surmounted by a conical top. If…
- Q8 From a solid cylinder whose height is 2.4 cm and diameter 1.4 cm, a…
- Q9 A wooden article was made by scooping out a hemisphere from each en…
- Q1 A solid is in the shape of a cone standing on a hemisphere with…
- Q2 Rachel, an engineering student, was asked to make a model shaped lik…
- Q3 A gulab jamun contains sugar syrup up to about 30% of its volume. F…
All 393 questions on Surface Areas and Volumes → Browse all Maths chapters →