Explanation: Let p.w. be Rs. x.
Then, S.l on Rs. x at `16%` for `9` months
`= Rs. 189.`
`:. x xx 16 xx 9/12 xx 1/100`
`= 189 or x 1575.`
`:. P.W. = Rs. 1575.`
`:. sum due = P.W. + T.D.`
`= Rs. (1575 + 189)`
`= Rs. 1764.`
Explanation: S.l. on Rs.`750 T.D. on Rs. 960.`
This means p.w. of Rs.`960. due `2` years hence is `Rs. 750.`
`:. T.D. = Rs. (960 - 750)`
`= Rs. 210.`
Thus, S.l on Rs.`750` for `2` years is Rs.`210`
:. Rate` = ((100 xx 210)/(750 xx 2))%`
`= 14%`
Explanation: S.l. on Rs.`(110 - 10)` for a certain time = Rs.`10`
S.l on `Rs.`100` for double the time `= Rs. 20`
T.D on `Rs. 120 = Rs.(120 - 100)`
`= Rs. 20`
T.D. on ` Rs. 110 = Rs. (20/ 120 xx 110)`
`= Rs. 18.33.`
Explanation: `p.w. of Rs. 12880`due `8` months hence
`= Rs. [(12880 xx 100)/(100 + (18 xx 8/12)]`
`= Rs. ((12880 xx 100)/(112))`
`= Rs. 11500.
cearly, Rs. `12000` in cash is a better offer.
Explanation: S.P.`= 102%` of `Rs. 600`
`=Rs. (102/100 xx 600)`
`= Rs. 612`
Now, P.W.`= Rs. 612` and sum
`=Rs. 688.50.`
:. T. D. = Rs. (688.50 - 612)`
`= Rs. 76.50.`
Thus, S.I. on `Rs. 612` for `9` months is `Rs. 76.50.`
:. Rate`= ((100 xx 76.50)/(612 xx 3/4))%`
`= 16 2/3%`.