The principle is given as Rs6300 and the simple interest is given as Rs2100 with time as 4 years.
S.I.=P×R×T100
2100=6300×R×4100
R=2100×1006300×4
R=8.34%
At what rate percent per annum will a sum of Rs. 4000 yield compound interest of Rs. 410 in 2 years?
At what rate percent compound interest per annum will rs. 640 amount to Rs. 774.40 in 2 years?