Elementary Mathematics
Decade, Yuga, Century A period of 10 consecutive years is a decade. A period of 12 consecutive years is a yuga. [ There is no term in English for yuga ] A period of 100 consecutive years is a century.
For example : The period from 2001 to 2010 is a decade. The period from 2001 to 2012 is a yuga. The period from 1901 to 2000 is a century (twentieth century) The period from Bangla years 1201 to 1300 is the thirteenth century. The period from Bangla years 1301 to 1400 is the fourteenth century. The period from Bangla years 1401 to 1500 is the fifteenth century. Example 5. Convert 3 years 2 months 12 days into hours. Solution :
3 years = 3 2 months = 2
365 days = 1095 days 60 days 30 days = 12 days
Sum
= 1167 days 24
1 year = 365 days 1 month = 30 days
1 day = 24 hours
4668 23340 28008 hours When no specific month is mentioned, a month is assumed to have 30 days. Example 6. Convert 3 years 5 months 15 days into minutes. Solution : 3 years = 3 365 days = 1095 days 1 year = 365 days 150 days 1 month = 30 days 5 months = 5 30 days = 15 days = 1260 days 1260 days 1 day = 24 hours
24 5040 25200 30240 hours 60 1814400 minutes 112
1 hour = 60 minutes