2nd questions

(A b)2

conditional probability

The capacity of a closed cylinder Vishal of height 1 m is 15.4 litres how many square metres of metal sheet would be needed to make it

If diameter of a cylinder is increased by 20% is then by what percent its height will decrease when its volume remains same

Greatest integer function of a negative number

If diameter of a cylinder is increased by 20 percentage then by what percent its height will decrease find its volume remaining same

5. _ _ 91/2

Purchased goods for cash

Show that if f(x) and g(x) are continuous at x0 then f(x)g(x) is also continuous at x0.

How 39 is come in that answer.

Backery

What is an onto function?

angles and arc lengths class 11

Sir please send me

Sir. I am a student of class 9.
In maths chapter 4-Linear Equation In Two Variables
Exercise 4.3 sum 5.
I didn't understand
Can you please please please please please send me this sum through the another method. 
On phone number 9896402964
Sir please send me by 7:00 o'clock
So that I can do my work on time
Sir please send me fast