Question

At what distance from a concave mirror of focul length 10cm shoul an object 2cm long be placed to get erect image 6cm

Answer 1

1/v+1/u=1/f
1/v+(1/-2)=(1/-10)
1/v=1/-10+1/2
1/v=-1+5/10
1/v=4/10
v=10/4
v=2.5cm

Answer 2

is this is correct answer or not