Question
A sum of money lent out at simple interest amounts to
Rs.620 after 2 years and to Rs.1220 after a further period of 4 years. The sum is:Solution
Principal + SI for 2 years = Rs. 620 ------ (i) Principal + SI for 6 years = Rs. 1220 ------ (ii) Subtracting equation (i) from (ii), we get => S.I. for 4 years = (1220 – 620) = Rs. 600 ∴  S.I. for 2 years = 600 × (2/4) = Rs. 300 ∴  Principal = (620 – 300) = Rs. 320
More Simple and compound interest Questions
72, 360, 370, 1850, 1880, 9300
Find the wrong number in given number series.
1500, 1450, 1390, 1350, 1240, 1150
324, 314, 294, 264, 224, 184
420, 380, 340, 300, 280, 220, 180
Find the wrong number in the given number series.
- 75, - 48, - 29, - 6, 17, 40
- Find the wrong number in the given number series.
5, 10, 30, 90, 540, 3240 74, 79, 86.5, 101.5, 109, 124, 141.5
Find the wrong number, in the given number series,
24, 48, 88, 144, 224, 304
8 10.4 6.8 10.2 7.6 10
Find the wrong number in the given number series.
15, 195, 575, 1155, 1935, 2915
