Multiple choice

A famous bakery in Green hill that remains open from 08:00 am to 08:00 pm is run by two brothers Ian and Johnson. Ian can bake 170 cookies per hour and his brother Johnson can bake 80 cookies per hour. They got an order for 12,000 cookies. Working together, in how many days will both the brothers complete the order?

  1. 2 days

  2. 3 days

  3. 4 days

  4. 5 days

  5. 6 days

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Combined rate = 170 + 80 = 250 cookies/hour. Daily capacity = 250 * 12 hours = 3000 cookies/day. Days required = 12000 / 3000 = 4 days.

AI explanation

First, calculate the total cookies baked per hour by adding their individual outputs: 170 + 80 = 250 cookies. Since the bakery operates for 12 hours a day from 08:00 am to 08:00 pm, their combined daily output is 250 * 12 = 3000 cookies. To complete the order of 12,000 cookies, divide the total order by the daily output: 12000 / 3000 = 4 days.