The time required to create one inch of top soil
A) 100 – 1000 years
B) 100 – 10,000 years
C) 100 – 5000 years
D) 100 – 15,000 years
1 Answers
Talk Doctor Online in Bissoy App
The angle of depression of the top of the tower from the top of a building is `30^(@)` and angle of elevation of the top of the tower from the bottom
Correct Answer - `(20(1+sqrt3))/(sqrt3)m`
2 Answers 1 views
A status 1.6 m tall, stands on the top of a pedestal. From a point on the ground, the angle of elevation of the top of the statue is `60^(@)` and from
Correct Answer - `2 m`
2 Answers 1 views
Five years ago, the sum of the ages of a father and two sons was \( x \) years, then after five years, the sum of the ages of all will be years.
5 years after age of each of father and his two sons will be 10 years more than it was 5years ago. Hence after 5years the sum of thieir age...
2 Answers 1 views
निम्न में से प्रत्येक को दशमलव रूप में लिखिए : `{:((a)20+4/10+1/1000,(b)137+5/100),((c)7/10+6/100+4/1000,(d)23+2/10+6/1000),((e)700+20+5+4/100,):}`
Correct Answer - `{:((a)29.41,(b)137.05,(c)0.764,(d)23.206,(e)725.09):}`
2 Answers 1 views
Number of earthworms present in one acre of land where the top soil is eight inches thick
Correct option is B) 50000
2 Answers 1 views
After 12 years the age of Ramu is 3 times the age before he was 4 years then his present age is ………………. years.
Correct option is (D) none Let Ramu's present age be x years. \(\therefore\) Ramu's age before 4 years = (x - 4) years Ramu's age after 12 years = (x + 12) years \(\therefore\) x+12 = 3(x-4) \(\Rightarrow\) x+12...
2 Answers 1 views
The top 8 inches of soil of one acre may contain ……….. of bacteria and fungi.
(B) 5 1/2 tons
2 Answers 1 views
Find the coefficient of \( x^{100} \) in;-1 \[ (1+x)+2(1+x)^{2}+3(1+x)^{3}+\ldots 1000(1+x)^{1000} \]
(1+x) + 2(1+x)2 + 3(1+x)3 + .....+ 1000 (1+x)1000 Now, 1 + (1+x) + (1+x)2 + (1+x)3 + .....+ 1+x)1000 = \(\frac{1-(1+x)^{1001}}{1-(1+x)}\) (∵1+x+x2+......+xn = \(\frac{1-(1+x)^{n+1}}{1-x}\)) By differentiating both sides w.r.t.x, we get ⇒ 1+2(1+x)+3(1+x)2 + .....+1000(1+x)999 = \(\frac{-[x\times -1001(1+x)^{1000}-(1-(1+x)^{1001}\times 1)]}{x^2}\) ⇒ 1+2(1+x)+3(1+x)2 + .....+1000(1+x)999...
2 Answers 1 views
The product of Shikha’s age five years ago and her age 8 years later is 30, her age at both times being given in years. Find her present age.
Let the present age of Shikha be ‘a’ years. Given, product of Shikha’s age five years ago and her age 8 years later is 30 ⇒ (a – 5)(a + 8) =...
2 Answers 1 views
The soil found in Northern Great Plains and coastal plains Red soil Alluvial soil Black soil Laterite soil
Alluvial soil.
2 Answers 1 views