Form the pair of linear equations for the following problems and find their solutions by substitution method.
(iv)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 ₹105 and for a journey of 15 km,the charge paid is ₹155 .What are the fixed charges and the charges per kilometer? How much does a person have to pay for travelling a distance of 25 km?

What are the point charges?

What are the two types of charges?

What is the charge on cathode ray particle?

What is the S.I. unit of charge?

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method:(i) A part of monthly hostel charges is fixed and the remaining depends on the number of days one has taken food in the mess.When a student A takes food for 20 days she has to pay Rs 1000 as hostel charges whereas a student B,who takes food for 26 days,pays Rs 1180 as hostel charges.Find the fixed charges and the cost of food per day.

what is law of conservation of charge ?

The charges q each are placed at a distance 2a and a third charge -2q is placed at the mid point. The P.E. of the system is