Question

Heather is a cashier. She can ring up 12 customers in 9 minutes.

Answer 1

Solution:

Time taken to ring 12 customers = 9min

Time taken to ring 1 customer =9/12 min

=3/4 min

Time taken to ring 4 customer = 3×4/4

=3 min

We can conclude that the correct answer is:

she will take 3 minutes to ring 4 customers