## Tempoh Masa

 4.1 Duration

 DURATION The time it takes for something to happen. To find the duration of something, we need the time it begins and the time it ends.

 DURATION INVOLVING DAY AND HOUR An annual book festival will start on 20 December 2022 at 8.00 A.M until 22 December 2022 at 12.00 P.M. Find the duration of the book festival. SOLUTION: Start time: 20 December 2022, 8.00 A.M End time: 22 December 2022, 12.00 P.M Duration of the festival = 2 days 4 hours

 DURATION INVOLVING MONTH AND DAY Mazlan will celebrate his birthday on 3 February. Mina will celebrate her birthday on 24 April. Find the duration between Mazlan's and Mina's bitrhday celebration. Leap year is a year when the total day of the year is 366 day instead of 365 day. The extra day is in February, making the month having 29 day of date. Leap years occurs every 4 years (2000, 2004, 2008, 2012 ...) SOLUTION: 3 February until 28 February 28 day - 3 day + 1 day = 26 day (plus 1 day because 3 February is counted) Number of day in March: 31 days 1 April until 24 April 24 days - 1 day + 1 day = 24 days Total days: 26 days + 31 days + 24 day = 81 days Therefore, the duration between Mazlan's and Mina's bitrhday celebration is 81 days.

 DURATION INVOLVING YEAR, MONTH AND DAY A new school wil be built. The construction starts on 1 Disember 2019 and expected to finish on 20 Januari 2021. Find the duration of the school construction in day. SOLUTION: 1 December 2019 until 31 December 2019 = 31 days 2020 is a leap year = 366 days 1 January 2021 until 20 January 2021 = 20 - 1 + 1 = 20 days The duration of the school construction: 31 + 366 + 20 = 417 days

## Tempoh Masa

 4.1 Duration

 DURATION The time it takes for something to happen. To find the duration of something, we need the time it begins and the time it ends.

 DURATION INVOLVING DAY AND HOUR An annual book festival will start on 20 December 2022 at 8.00 A.M until 22 December 2022 at 12.00 P.M. Find the duration of the book festival. SOLUTION: Start time: 20 December 2022, 8.00 A.M End time: 22 December 2022, 12.00 P.M Duration of the festival = 2 days 4 hours

 DURATION INVOLVING MONTH AND DAY Mazlan will celebrate his birthday on 3 February. Mina will celebrate her birthday on 24 April. Find the duration between Mazlan's and Mina's bitrhday celebration. Leap year is a year when the total day of the year is 366 day instead of 365 day. The extra day is in February, making the month having 29 day of date. Leap years occurs every 4 years (2000, 2004, 2008, 2012 ...) SOLUTION: 3 February until 28 February 28 day - 3 day + 1 day = 26 day (plus 1 day because 3 February is counted) Number of day in March: 31 days 1 April until 24 April 24 days - 1 day + 1 day = 24 days Total days: 26 days + 31 days + 24 day = 81 days Therefore, the duration between Mazlan's and Mina's bitrhday celebration is 81 days.

 DURATION INVOLVING YEAR, MONTH AND DAY A new school wil be built. The construction starts on 1 Disember 2019 and expected to finish on 20 Januari 2021. Find the duration of the school construction in day. SOLUTION: 1 December 2019 until 31 December 2019 = 31 days 2020 is a leap year = 366 days 1 January 2021 until 20 January 2021 = 20 - 1 + 1 = 20 days The duration of the school construction: 31 + 366 + 20 = 417 days