Question : In sea, plants are restricted up to the depth of

Option 1: 20 m

Option 2: 200 m 

Option 3: 1000 m 

Option 4: 2000 m 

Question : If $\cos 20°= m$ and $\cos 70°=n$, then the value of $m^2+n^2$:

Option 1: $1$

Option 2: $\frac{3}{2}$

Option 3: $\frac{1}{\sqrt2}$

Option 4: $\frac{1}{2}$

Question : The simplified value of $(0.2)^{3}\times 200\div 2000$ of $(0.2)^{2}$ is:

Option 1: $\frac{1}{100}$

Option 2: $\frac{1}{50}$

Option 3: $\frac{1}{10}$

Option 4: $1$

Question : The ratio of the length of a school ground to its width is 5 : 2, if the width is 40 m then the length is:

Option 1: 200 m

Option 2: 100 m

Option 3: 50 m

Option 4: 80 m

Question : The wet temperate type of forests is found between a height of _______ metres.

Option 1: 2000 and 3000

Option 2: 1500 and 3000

Option 3: 1000 and 2000

Option 4: 500 to 1000

Question : The smallest among the numbers $2^{250},3^{150},5^{100}$, and $4^{200}$ is:

Option 1: $4^{200}$

Option 2: $5^{100}$

Option 3: $3^{150}$

Option 4: $2^{250}$