Question

At 9 AM Monday morning Thomas feels a beaker with water and places it in the corner of the classroom. At 1 PM Tuesday Thomas exams the beaker and noticed that the water level is 42 Millilters. At 11 AM on Wednesday the water level has dropped to 31 Milliliters. Is that evaporation of the water follows a linear function what time will the beaker be empty?

1am on Thursday
2:30 am on Thursday
1 am on Saturday
6am on Saturday

Answer 1

at 6 am on Saturday the beaker will be empty because every 22 hours the beaker loses 11 milliliters of water.

Answer 2

The level has dropped 11 mms in 22 hours

that is 0.5mm per hour

So the remaining 31 mm will be gone in 31 / 0.5 = 62 hours

62 hours after 11 am Wednesday brings us to 11 am Friday + 14 hours

= 1 am Saturday. answer