Question

2 resistor of 5ohm and 10ohm are connected in series.what would be their equivalent resistance.

Answer 1

R=R1+R12
R=5 + 10
=15 ohms

Answer 2

A shopkeeper mixes 35 kg of wheat which cost him rs.15 per kg with 25 kg of wheat which cost him rs.20 per kg.he sells the mixture at rs.22 per kg.his gain is