Question
A right circular cone is surmounted by a hemisphere. The
base radius of the cone is equal to the radius of the hemisphere. The diameter of the hemisphere is 12 cm while the height of the cone is 8 cm. Find the cost of painting the compound object if it costs ₹25 to paint a cm².Solution
Radius = 12 / 2 = 6 cm Since the right circular cone is surmounted on a hemisphere, the area of the base. = 2 π ×62 = 72 π cm² Slant Height = √62 +√82 = 10 cm Hence, the total surface area of the cone is surmounted on the hemisphere. The curved surface area of the cone + the area of the base=π× 6 × 10 + 72π=132π Thus, the cost of painting the compound object = (25 × 132π) / π = 3300 The cost of painting the compound object is ₹3300. 
Select the most appropriate meaning of the Given idiom.
Word of mouth
Select the most appropriate meaning of the given Idiom.
BECK AND CALL
In each question below, a sentence is given with an idiom/phrase printed in bold type. That part may contain a grammatical error. Each sentence is follo...
Select the most appropriate meaning of the given idiom.
To bear the palm
Select the most appropriate meaning of the given idiom.
The whole nine yards
Choose the correct replacement for the bold phrase.
When the police arrived, the burglars ran over the back wall to escape.
...When it comes to solving this problem, we need to think outside the box to find a creative solution.
- Which of the following idioms means ‘to initiate action, especially when others are reluctant or waiting’?
Fill in the blank with an appropriate idiom.
Despite his initial hesitation, John decided to __________ and invest all his savings in the start...
- Think on your ______
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