Question

A photocopier take 8 econd to make 20 copie. How long will it take to make 45 copie?

Answer 1

Given that a photocopier takes 8s to make 20 copies and we need to find out how long would it take to make 45 copies .

This can be solved using Unitary Method as ,

To make 20 copies it takes 8 s.

To make 1 copy it would take 8/20 s

Hence to make 45 copies it would take 8/20*45 = 18s

And we are done!

Answer 2

45 copies = 18 seconds

Explanation:

Time taken to make 1 copy,

→ Total time ÷ Total copies

→ 8 ÷ 20

→ 8/20 seconds

Then the time taken for 45 copies,

→ 45 × (8/20)

→ (45 × 8)/20

→ 360/20

→ 18 seconds

Hence, time taken is 18 seconds.