Mohan lent some amount of money at 9% simple interest and an equal amount of money at 10% simple interest each for two years. If his total interest was Rs. 760, what amount was lent in each case ?
Options:
A . Rs.1800
B . Rs.1700
C . Rs.2000
D . Rs.1900
Answer: Option C Answer: (c)Using Rule 1,Let the sum lent in each case be x.Then, ${x × 9 × 2}/100 + {x × 10 × 2}/100$ = 760${x × 2}/100$(9 + 10) = 760${2 × 19x}/100$ = 760$x = {760 × 100}/{2 × 19}$ = Rs.2000
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