Assuming the earth to be a sphere of radius 6370 km.If seventy five percent of the earth's surface is covered by water, then find how many square kilometres is area of the land.
6370*0.75 or 6370/0.25
surface area of earth which is land
= (1/4)4πr^2
= π(6370)^2
= 127,476,091 km^2
=
If 3/4 th part is covered by water , remaining part will pe area of land I.e. 1-3/4= 1/4 th part
Radius given=6370 ,
Area is sphere= 4πr^2
1/4(4*22/7*6370*6370)
After solving we will get the ans as -- 127527400 km^2
Hope helped !
To find the area of the land, we need to subtract the area of water from the total surface area of the Earth.
Step 1: Calculate the total surface area of the Earth.
The formula for the surface area of a sphere is 4πr², where r is the radius of the sphere.
Given that the radius of the Earth is 6370 km, we can substitute this value into the formula:
Surface area of Earth = 4πr² = 4π(6370 km)².
Step 2: Calculate the area covered by water.
Given that 75% of the Earth's surface is covered by water, we can use this percentage to find the area:
Area of water = (75/100) × Surface area of Earth.
Step 3: Calculate the area of land.
The area of land can be found by subtracting the area of water from the total surface area:
Area of land = Surface area of Earth - Area of water.
Let's calculate the area of land now:
Radius of Earth (r) = 6370 km
Surface area of Earth = 4π(6370 km)²
Area of water = (75/100) × Surface area of Earth
Area of land = Surface area of Earth - Area of water
By substituting the values and performing the calculations, we can find the area of the land.