Duration

Hello, children. How’s your school holiday? Today, we’ll learn how to calculate the duration of an event in between months, years and dates.

Example 1

Saujana IT Centre offers a few computer courses as shown in the schedule.

Saujana IT Centre

Course Schedule for 2011

1. Photoshop Course	January to April
2. PowerPoint Course	March to June
3. InDesign Course	May to September

Adrian decides to attend a PowerPoint Course. What is the duration of the course?

 

Solution:

The duration of the course is calculated from the begining of March to the end of June.

March

April

May

June

1 month + 1 month + 1 month + 1 month = 4 month

The duration from March to June is 4 months.

Adrin will attend the course for 4 months.

Example 2

Puan Hamidah worked in Sekolah Kebangsaan Setia from June 2006 to October 2009. How long did she work in that school?

Solution:

June 2006 to May 2007

June 2007 to May 2008

June 2008 to May 2009

June 2009 to October 2009

1 year + 1 year + 1 year + 5 months = 3 years and 5 months

The duration from June 2006 to October 2009 is 3 years and 5 months.

Puan Hamidah worked in Sekolah Kebangsaan Setia for 3 years and 5 months.

 

Example 3

The pupils of Class 6 Hijau started their Science project on 15 April 2011. They completed their project on 8 July 2011. What was the duration of their project?

Solution:

15 to 30 April

1 May to 30 June

1 to 8 July

From 15 to 30 April : 30 – 15 + 1 = 16 days

From 1 to 8 July   : 8 - 1 + 1 = 8 days

16 days + 2 months + 8 days = 2 months 24 days

The duration from 15 April 2011 to 8 July 2011 is 2 months and 24 days.

The duration of their project was 2 months and 24 days.

 

Now, try to complete the table below.

Event started	Event ended	Duration
July 2008	December 2008
February 2009	March 2011
26 June 2007	13 September 2010