Aptitude - True Discount - Discussion
Discussion Forum : True Discount - General Questions (Q.No. 5)
5.
If Rs. 10 be allowed as true discount on a bill of Rs. 110 due at the end of a certain time, then the discount allowed on the same sum due at the end of double the time is:
Answer: Option
Explanation:
S.I. on Rs. (110 - 10) for a certain time = Rs. 10.
S.I. 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 | x 110 |  |
= Rs. 18.33 |
| 120 |
Discussion:
29 comments Page 3 of 3.
Vinay said:
1 decade ago
The discount allowed on the same sum 110 is double the time means 10 becomes 20%
So, 20% will come.
Therefore, principal amount is 100 for both the cases
(20x 110)/120= Rs. 18.33
So, 20% will come.
Therefore, principal amount is 100 for both the cases
(20x 110)/120= Rs. 18.33
Shubha said:
1 decade ago
How you have got p.W=(Amt*100)/(100+(r*t))
Abhishek said:
1 decade ago
According to question,
Amount=110,True Discount=10,Present Worth=110-10=100;
Now,we know,P.W.=(Amount*100)/100+(R*T);
So,100=(110*100)/100+(R*T);that implies (R*T)=10;
Again in question,
(R*2T)=(2RT)=2*10=20;Now,
P.W.=(110*100)/100+(2RT)=(110*100)/100+20=91.66;
So,T.D.=Amount-P.W.=110-91.66=Rs.18.34/- (clear)....
Amount=110,True Discount=10,Present Worth=110-10=100;
Now,we know,P.W.=(Amount*100)/100+(R*T);
So,100=(110*100)/100+(R*T);that implies (R*T)=10;
Again in question,
(R*2T)=(2RT)=2*10=20;Now,
P.W.=(110*100)/100+(2RT)=(110*100)/100+20=91.66;
So,T.D.=Amount-P.W.=110-91.66=Rs.18.34/- (clear)....
(14)
Raghubabu said:
1 decade ago
I cant understand it please explain by another form.
Karthick said:
1 decade ago
Please explain the sum and which formula you are used here.
Meha said:
1 decade ago
Whar ever the formula is given at biginig that was not comparable here. Which formula you are used here? please expline the formula.
Revathy said:
1 decade ago
Please help us out here.
Karthika said:
1 decade ago
Please explain. I can't get the concept.
Murali said:
1 decade ago
Please provide some more explanation. Then it is easily understood by me and others.
Post your comments here:
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