The length of a pencil is measured using a ruler as shown in the given figure. What is the apparent length of the pencil seen by the observer and the actual length of the pencil?
Apparent length | Actual length | |
---|---|---|
A | 42 mm | 40 mm |
B | 5 mm | 10 mm |
C | 38 mm | 30 mm |
D | 38 mm | 40 mm |