Question

Class 9 ..ch.9 ....ex. 9.3...no. 6 
Can it also be done by not drawing any perpendicular lines?

 

 

On 1st  January ,2006 a ltd . Purchased a machine for 240000 and spent 10000 on ist ,erection .on ist July,2006 an additional machinery costing 100,000 was purchased .on ist july 2008 the machine purchased on ist January 2006 was,sold fo 143000 and on the,same date a new,machine w a s purchased at a cost of 200000 . Show the machine account for the fast three calender years after charging depreciation at 5%by the straight line method

Another method of this problem is

• Explain the problem 
  

Calculate the horsepower of a man who can chew ice at the rate of 30 gram per minute given 1 HP is equal to 746 watt and jequal to 4.2 G per c a l -1

Find the principal solution of the following: cosec X=-2 .

Evaluate cosec (-765°).

Find the maximum number of hand-shakes possible in a room of 10 persons.

Solve the inequality 1/x-4<0 and show the solution on number line.

1.                     
   

How to solve 3x pulse 2y

Sin(90 A)

Sin (90 A)

I want to understand that how to find square root of any value with short trick.

Question ,3 exercise 7.4 in chapter 7 class 9

 

Question ,3 exercise 7.4 in chapter 7 class 9

 

Question ,3 exercise 7.4 in chapter 7 class 9

 

Diameter of a  cylinder is decreased by 25%  then what is the change in lateral surface area of cylinder