20 years.
1 decade equals 10 years. So 2 decades is equal to 20 years.
10 years = 1 decade 20 years = 2 decades 30 years = 3 decades . . etc.
20 decades = 2 centuries or 20*10 = 200 years
No. 1 decade = 10 years 20 decades = (20 *10)= 200 years 2 centuries = 200 yrs. They are the same.
There are 20 decades in two centuries There is 200 years in two centuries and 10 years in a decade. 10 years x 20 decades = 200 years or two centuries
Ten decades equal one century therefore twenty decades equal two centuries.
1 decade is 10 years which means 9 decades is 90 years. (10x9) 1 decade= 10 years (10x1) 2 decades= 20 years (10x2) 3 decades= 30 years (10x3) 4 decades= 40 years (10x4) 5 decades= 50 years (10x5) 6 decades= 60 years (10x6) 7 decades= 70 years (10x7) 8 decades= 80 years (10x8) 9 decades= 90 years (10x9) 10 decades= 100 years (10x10)
well a decade is 10 year so 2 decades will be 20 years
20 decades 2 centuries = 200 years 1 decade = 10 years 200/10 = 20
1 decade has 10 years and 1 score has 20 years, therefor there are 2 decades in a score.
2 decades after 1620 is 1600 because 1 decade is 10 years so 2 decades must be 20 so 1620 + 20= 1640