Question
The time taken by βAβ to build a wall alone is 40%
more than the time taken by him to build it along with βBβ. βBβ will take how much percent more time to build the same wall than the time taken by him to build it along with βAβ?Solution
Let the work βAβ and βBβ, can do in 1 day be βaβ units and βbβ units, respectively. Let they takes βpβ days to build the wall, together Therefore, Total work = (a + b) Γ p units β¦β¦.. (1) According to the question, Time taken by βAβ to build the wall alone = 1.4p days Therefore, total work = 1.4p Γ a unitsβ¦.. (2) From equation (1) and (2), we get 2.5b = a Therefore, total work to be done = (a + b) Γ p = 3.5bp units Time taken by 'B' to build the wall = 3.5bp/b = 3.5p days Therefore, required percentage = (3.5p β p)/p} Γ 100 = 250% more time
If '+' means 'Γ·', 'Γ·' means 'β', 'β' means 'Γ', 'Γ' means '+', then ' 30 + 10 Γ· 6 β 5 Γ 6 ' = (?)
...Which signs should be interchanged to make the given equation correct.
45 Γ· 5/3 + 10 Γ 2/5 - 5 = 95
After interchanging '- ' and '+ ' , 6 and 7 , which of the following equations becomes correct?
...Select the correct combination of mathematical signs to sequentially replace the signs, to balance the following equation.
(12*7*6)* 13 *6
A cube is made by following the given sheet. In the cube so formed, What would be the symbol on the opposite side of the # Symbol?
If 'P' denote 'Γ·', 'ΞΈ' denotes 'x', 'R' denotes '+' and 'S' denotes '-', what is the value of ' 18 ΞΈ 12 P 4 R 5 S 6 '.
If β#β denotes β-β, @ denotes βΓβ, β$β denotes β+β and β%β denotes βΓ·β, thenΒ
20 $ 15 # 10 @ 45 % 15
...The given equation has been solved on the basis of a certain rule. Find the correct answer for the unsolved equation on that basis.
If p × ...
Which two signs should be interchanged to make the given equation correct?
225 + 5 × 3 ÷ 5 – 7 = 133
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