Question

Question Number 21
Give Answer
!!

Answer 1

Let CP be x

than gain % =X

SP= $\frac{100+g%}{100}$×CP

=>x × $\frac{100+x}{100}$ =11

=>x²+100x -1100=0

=>x²+110x-10x-1100 =0

=>x(x+110)-10(x+110)=0

=>(x-10)(x+110)=0

x=10 , -110

CP cannot be negative

so CP = 10 rupee

Answer 2

Answer:

Step-by-step explanation:

Science is a wonder that makes us wonder!!

We live in the ages of Science! Science has contributes to the easiness and pleasures of man ever-since. Science teaches us, Helps us, most of all science keeps us going. It couldn't have been possible for man to survive without science.

Science has made our lives easy and more comfortable. How?

Well, ask me how not?

Electricity- Science works like a magic. I don't think we need to really explain how important electricity is.The radio,television,lights,fans,electric iron,mills,factories...etc..etc..

Communication: Science has linked up the distance parts of the world.Science has done wonders inn the field of communication. World communicates because of science!

Medical science: Science has lessened human sufferings.

In education: Science has spread education among people

In agriculture:Farmers use scientific tools for cultivation and grow more foods,crops,fruits etc.

Many more....endless list..

Overall  Science is the greatest of all conquerors both past and present.It knows on defeat.It has established itself firmly in our hearts.

Thank you

Hope this helps..!!