Question
A well with 20 m inside diameter is dug 10 m deep. Soil
taken out of it has been evenly spread all around it to a width of 30 m to form an embankment. Find the height of the embankment.ÂSolution
Volume of the soil dug out = πr2h ⟹( (22)/(7) x 10 x 10 x 10) = 3,142.85m³. Area of embankment = Area of embankment with well - Area of well = ( x 40 x 40) - ( x 10 x 10 ) = 4,714 m² Height of embankment = (Volume)/(Area) = (3142.85)/(4714.3) = (2)/(3)m.
If ‘+’ means ‘÷’, ‘-’ means ‘+’, ‘×’ means ‘-’ and ‘÷’ means ‘×’, then find the value of the following expression? ...
Select the correct combination of mathematical signs that can sequentially replace the $ signs and make the equation correct.
252 $ 28 $ 17 $ ...
Select the correct combination of mathematical signs that can sequentially replace the * signs and make the equation correct.
45 $ 5 $ 68 $ 17$ 12 = 37
If ‘A’ denotes ‘÷’, ‘B’ denotes ‘x’, ‘C’ denotes ‘+’ and ‘D’ denotes ‘-’.Then find the value of 12 B 9 A 3 C 28 A 2 = ?...
If '!' means ' - ', '#' means '+', '%' means '÷' and '@' means ' X ', then what is the value of the following expression?
25 # 3 % 15 @ 35 ! 23
Mohit and Sudesh bought pens and notebooks from the same shop. Mohit bought 3 pens and 6 notebooks by paying an amount of ₹180. Sudesh bought 5 pens a...
Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
168 * 8 * 7 * 34 * 94 = 256
If 14 (16) 8 and 28 (20) 5, then what is the value of A in 63 (A) 4?
Select the correct combination of the mathematical signs to replace the ‘@’ symbols in the below equation and thereby balance it:
81@9@5@30@1...
By interchanging the given two numbers (not digits), which of the following equations will be correct?
24 and 9
I. 113 + 24 – 20 × 9 ÷...
Relevant for Exams:
