Answers

2016-01-06T18:57:54+05:30
At 5% rate of simple interest the sum of money double itself in 20 years.....
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2016-01-06T19:31:12+05:30
RATE -?
LET SUM BE ' X'.
TIME- 20 YRS
AMOUNT-2×X =2X
INTEREST =2X-X=X
WE KNOW
R=(INTEREST ×100)÷SUM×TIME=
(X×100)÷X×20=5%
at 5% rate of interest SUM will double itself in 20 yrs....
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