Question
A circular swimming pool is surrounded by a circular
path which is 4 m wide. If the area of the path is 44% of the area of the swimming pool, then the radius (in metres) of the pool will be:Solution
Area of a circle = Οr2 Let radius of circular pool be βaβ meter Given, Radius of circular path = a + 4 Area of a circular pool = Οa2 Area of a pool + circular path = Ο(a + 4)2 Given, β Ο(a + 4)2 β Οa2 = 40% Γ Οa2 β Ο(a + 4)2 β Οa2 = 11/25 Γ Οa2 β a2 + 8a + 16 β a2 = 11a2 /25 β 11a2 β 200a β 400 = 0 β 11a2 β 220a + 20a β 400 = 0 β 11a(a β 20) + 20(a β 20) = 0 β a = -20/11 or a = 20 β΄ Radius of a pool is 20 m.
- Identify the INCORRECTLY spelt word in the following sentence and select its correct spelling from the given options.
The committee appreciated her... 1) Decietful
2) Desolate
3) Ingridient
4) Poisonus
In FY24, municipal corporations in India are istimated to generate 50% of their revenue from their own taxes, fees, and user charges.Β
...Meteorologists had previously forecast a historic hurricane season for 2024 based on the expectation that a strong La NiΓ±a would emerge this winter. <...
The Parliamentary Standing Committee on Finance, headed by Congress MP Veerappa Moily, was on Tuesday breifed on the impact of demonetisation by the Min...
In the question below, a sentence is given, four words have been highlighted in bold. Find out if the words are appropriate (grammatically and contextu...
- Choose the word that is misspelled:
Choose the correct spelling of the words below.
Choose the correctly spelt word.
1) depraive
2) deprave
3) deprayve
4) deprawve
5) none of these
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