Question

The reading of a scale at one end is 3.5 cm and at the other end is 18.5 cm. Calculate the lengths of the needle

Answer 1

15 cm

Explanation:

Given that :

Reading at one end, initial reading = 3.5 cm

Reading at the other end, final reading = 18.5 cm

Length of needle :

Final Reading - Initial reading

18.5cm - 3.5cm

= 15cm