Question

find the total resistance value of 10 ohms and 20 ohms connected in parallel​

Answer 1

formula for calculating resistors connected in parallel pattern-$\frac{1}{R} =\frac{1}{R1} +\frac{1}{R2} .....+\frac{1}{Rn}$

1/R= 1/10 + 1/ 20

1/R= 3/20 Ohm

R = 20/3 Ohm =  6.66 ohm