Degrades the quality of water for drinking, wildlife, and the land surrounding streams
Some of the benefits of river Nile is that it has very fertile flood plains resulting from seasonal floods along the banks. But although Nile river has countless benefits or advantages. Such as:
Used for washing clothstransportationIrrigationfarmingAnd reeds that grew along the banks called papyrus. They are used for writing thing in the ancient times.
Answer : The value of
is
.
Explanation :
As we are given 6 right angled triangle in the given figure.
First we have to calculate the value of
.
Using Pythagoras theorem in triangle 1 :




Now we have to calculate the value of
.
Using Pythagoras theorem in triangle 2 :





Now we have to calculate the value of
.
Using Pythagoras theorem in triangle 3 :





Now we have to calculate the value of
.
Using Pythagoras theorem in triangle 4 :





Now we have to calculate the value of
.
Using Pythagoras theorem in triangle 5 :





Now we have to calculate the value of
.
Using Pythagoras theorem in triangle 6 :





Therefore, the value of
is
.
The answwer is b but not exactly