Question

Akriti found that some of the initial marks at the beginning of her rulers are faded so she decided to use the 2 centimetres marks for measuring the length what is the length of PQ if the cm marks against the point Q is 11. 5

Answer 1

In such cases, you simply need to subtract the beginning value from the total measured value.
Hence 11.5-2=9.5
Hence, PQ=9.5cm