Question

plz tell with full steps not direct ans​

Answer 1

Answer:

Screen is 40m far from the object .

(20+20+20=60 (as said three times) )

(60-20=40)

hope this helps you tq

Answer 2

Answer:

=-60

Explanation:

,

, =-3( )

,=-20

,=-(\-20)

==-60

60

, 40(=60 -20)