Question

Heather is a cashier. She can ring up 12 customers in 9 minutes.At this rate, how many minutes does it take her to ring up 4 customers?

Answer 1

12 customers = 9 mins

1 customer = 9 ÷ 12 = 3/4 min

4 customers = 3/4 x 4 = 3 mins

Answer: 3 mins