Form the pair of linear equations for the following problems and find their solution by substitution method.
The taxi charges in a city consist' of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs105 and for a journey of 15 km, the charges paid is Rs155. What are the fixed charges and the charge per km? How much does a person have to pay for travelling a distance of 25 km ?

From the pair of linear equations in the foIlowing problems and find their solution by substitution method: The taxi charges in a City consist of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs. 105 and for a journey of 15 km, the charge paid is Rs 155. What are the fixed charges and the charge per km? How much does a person have to pay for travelling a distance of 25km?

From the pair of linear equations in the following problems and find their solutions (if they exist) by elimination method : The car hire charges in a city comprise of a fixed charges together with the charges for the distance covered. For a journey of 12 km, the charge paid is rs 89 and for a journey of 20 km, the charge paid is rs 145. What will a person have to pay for travelling a distance of 30 km?

Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method : A lending library has a fixed charge for the first three days and an additional charge for each day there after. Saritha paid Rs 27 for a book kept for seven days, while Susy paid ’ Rs 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.

In a charged conductor the charge resides at the

What is the net charge on a charged capacitor?

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method :- The total expenditure per month of a household consists of a fixed rent of the house and mess charges depending upon the number of people sharing the house. The total monthly expenditure is ? 3900 for 2 people and 7500 for 5 people. Find the rent of the house and mess charges per head per month.

From the pair of linear equations in the following problems and find their solutions (if they exist) by elimination method : A part of monthly hostel charges in a college are fixed and remaining depend on number of days one has taken food in the mess. When a student A takes food for 20 days, he has to pay rs 1000 as hostel charges whereas student B who takes food for 26 days has to pay rs 1180 as hostel charges. Find fixed charges and cost of food per day.

Electric potential at a distance 0.9 m from a charge is +50V. Find the magnitude and nature of the charge.