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Sia ? 4 years, 2 months ago
Let the height of the building is BC, the height of the transmission tower which is fixed at the top of the building be AB.
D is the point on the ground from where the angles of elevation of the bottom B and the top A of the transmission tower AB are 45° and 60° respectively.
The distance of the point of observation D from the base of the building C is CD.
Combined height of the building and tower = AC = AB + BC
Trigonometric ratio involving sides AC, BC, CD, and ∠D (45° and 60°) is tan θ.
In ΔBCD,
tan 45° = BC/CD
1 = 20/CD
CD = 20
In ΔACD,
tan 60° = AC/CD
√3 = AC/20
AC = 20√3
Height of the tower, AB = AC - BC
AB = 20√3 - 20 m
= 20 (√3 - 1) m
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Jawaharlal Nehru proclaimed the dams as the "temples of modern India" because :
- It would integrate development of agriculture.
- Developed the village economy with rapid industrialisation.
- Growth of the urban economy.
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Microsoft Office 2007 is a version of Microsoft Office, a family of office suites and productivity software for Windows, developed and published by Microsoft.
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समास (Samas In Hindi): समास का तात्पर्य है 'संक्षिप्तीकरण'। हिन्दी व्याकरण में समास का शाब्दिक अर्थ होता है छोटा रूप; जब दो या दो से अधिक शब्दों से मिलकर जो नया और छोटा शब्द बनता है उस शब्द को हिन्दी में समास कहते हैं।
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Sia ? 4 years, 2 months ago
Resistance of heater = 20Ω
V = 240v
Time for which is the heater used daily = 2 hrs
Cost = Rs. 4.30 per kWh
Total Work done by the heater every day =
Total work done by the heater in a Month of 30 days = 5760*30/1000
=>172.8kWh
Total Cost = 172.8 * 4.30 = Rs. 743.04
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