Question
A wooden cylinder of base radius 14 cm is cut to make a
cone of same height and same base radius. Find out the percentage of waste wood?Solution
Radius of cylinder = 14 cm Let the height of the cylinder = h cm Radius of cone = Radius of cylinder = 14 cm Height of a cone = height of cylinder = h cm Volume of cylinder = π r²h ( Volume of wood ) Volume of cone = 1/3 π r²h Quantity of waste wood = ( Volume of cylinder ) - ( Volume of cone ) = π r²h - 1/3 π r²h ( By dividing equation from π r²h ) = 1 - 1/3 = 2/3 Percentage of waste wood = 2/3 x 100 = 66.66%
19.89% of 449.67 + 14.67% of 299.89 - 9.89% of 99.79 = ?
`(sqrt(960.87)xx9.932+sqrt(629.998)xx26.385)/(sqrt(1028.902)xx4.977)=?`
Find the approximate value of Question mark(?). There is no requirement to find the exact value.
? = 200.14 + 27.98 × 16.05 − (10.03)² - 12.9...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
1299.999 ÷ 325.018 × 24.996 = ?
What approximate value should replace the question mark?
99.95 − √529 × 3 + 1439.80 ÷ 12.02 = ?
619.97 ÷ 20.01 X 124.99 ÷ 24.91 = ?
124% of 620.99 + 11.65% of 1279.23 = ?
What approximate value should replace the question mark?
9.96% of 1200.10 − 25% of 4800 = ? − 7000.20
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