Question
If the total cost of 6 notebooks and 4 pencils is Rs. 240
and the total cost of 5 notebooks and 3 pencils is Rs. 195, then find the cost of 7 notebooks.Solution
ATQ,
Let the cost of one notebook and one pencil be Rs. x and Rs. y, respectively.
ATQ;
6x+4y=240.......(I)
5x+3y=195.......(II)
Multiply Equation (II) by 4 and Equation (I) by 3, then subtract:
20x+12y−18x−12y=780−720
2x=60
x=30
Cost of 7 notebooks = 7×30=210 Rs.
Which of the following is a depreciation method that is not commonly used?
Under the Trade Union Act 1926, what is the time limit for a Trade Union to send a notice of dissolution to the Registrar?
With reference to Indian economy, consider the following statements:
1. Primary sector comprises more than half of the employed workforce of th...
Assertion (A): Point of order is raised to criticize a policy of the government. Reason (R): It is an important tool of legislative control.
How and when is oxygen produced as a waste product in plants?
Mission “Indradhanush” belongs to :
A and B enter into partnership. A invests some money at beginning, B invests thrice the amount after 8 months and C invests double the amount after 5 mo...
The ratio of two numbers is 7 : 5, and their HCF is 6. What is their LCM?
With reference to the work of human kidney, consider the following statement:
1. After the waste is remove in the kidney, the clear blood is sent...
Dr. Aykroyd's formula is associated with determination of
