Question
The volume of a cube is 2744 cm 3 in
which a maximum possible size of circle is drawn on each face. The circle drawn on each face of the cube is painted by pink colour at the rate of Rs. 12.5 per cm 2 and the remaining part of the cube is painted by the red colour at the rate of Rs. ‘y’ per cm 2. If the total cost of painting the entire cube is Rs. 24888, then find out the value of ‘y’Solution
The volume of a cube is 2744cm3. (Length of each side of cube)3 = 2744 Length of each side of cube =14 cm A maximum possible size of circle is drawn on each face of the cube. Then the diameter of the circle is equal to the length of each side of the cube. diameter of the circle = 14 cm Radius of circle = 14/2 = 7 cm The circle drawn on each face of the cube is painted by pink colour at the rate of Rs. 20.5 per cm2 and the remaining part of the cube is painted by the red colour at the rate of Rs. ‘y’ per cm2. If the total cost of painting the entire cube is Rs. 24888. cost of painting each side of cube = 24888/6 = Rs. 4148 [20.5 x (22/7) x (radius)2] + [y x [14x14- [(22/7) x (radius)2]]] = 4148 Put the radius in the above equation. [20.5 x (22/7) x (7)2] + [y x [14 x 14- [(22/7) x (7)2]]] = 4148 [20.5 x (22/7) x 49] + [y x [196- [(22/7) x 49]]] = 4148 [20.5 x 154] + [y x [196-154]] = 4148 3157 + y x 42 = 4148 42y = 4148-3157 42y = 991 Value of ‘y’ = 23.59
The Reserve Bank of India (RBI)’s study group, which recently submitted its report on an external benchmark rate for banks, has revealed several s...
Children must be given a chance to taste food from __________ cuisines, and one of the best ways to do it is by travelling.
(A) different (B) di...
In the given question a sentence is given with a blank and you have to choose an appropriate word from the given options that can fill the sentence mak...
The artist's latest masterpiece is a ___________ of colors and emotions, capturing the essence of nature's beauty in a single canvas.
This year’s drills were designed to inspect the mechanized units’ progress in their mobile combat capabilities and to further ____________ c...
The Reserve Bank of India has ………… Master directions on the issuance and operation of prepaid payment instruments (PPI) in t...
- In the following sentence, choose the word opposite in meaning to the bold word to fill in the blank.
Despite her arrogant behavior at first, she b... - In each of the following sentences, there is a blank space. Below each such sentence, there are five options with one word each. Fill up the blank with the...
Directions :Â In the following passage, some of the words have been left out and replaced by a blank represented by a letter. First read the passage and...
Each question below has two blanks, which is indicating that something has been omitted. Choose the most suitable option indicating the words that can ...