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Simple Methods to Solve Simple Interest Part 4
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This lesson will help one to know simple methods which will help to solve problems on simple interest. Dhiraj has solved some model questions on simple interest in this unit, which will make gain better comprehension on the smart tricks. ​

Dhiraj Singh Chauhan
Income-tax Inspector, Cleared Assistant Commandant(SSB), From Saharanpur

U
Very nice sir good
Sir i have doubt in annual installmentof 770rs question. If we take loan/debt of 770 for 5 yrs at 5% then its total s.i. for 5 yrs is 192.5rs. so amount payable is 962.50rs. installment is decided on pa+s.i. that is total amount. installment amount payable is same throughout, it doesnt change. so here emi for 60 months monthly is rs16.04 and anual installment is rs192.50. so how the answer is rs140???? please clear my doubt sir.
Vikash kumar
2 years ago
go through the question it says 770 is dues in 5 years means total amount of loan becomes 770 after complition of 5 year
2 years ago
Agar waisa hi hai toh app agar 140 karke installment de rahe ho taab vi 5yrs mei 700 rupees hi repay hote hai...
2 years ago
Matlab har installment same hoga aisa koi baat nahi hai...wch v usualy thnk as in case of EMI
thanks Jay Gupta
2 years ago
hmm. welcome...discussion se mera vi concept clear hua....
Last question ko hum ek aur trick se solve kr skte hai...Just suppose ki hume bache hua amount jo ki 4000 hai and installment hamari 500 ki hai...to isko chukane me 8 months lagne chahiye lekin interest ki wajah se 9 months lag rahe hai aur sath hi sath hume 500 extra pay krne padd rahe hai jo ki kuch aur nhi SI hai ...bs formula me put kro and solve kro...Rx9=(500/4000)*100
Nisha Sharma
2 years ago
Don't you think...time should be 9/12 as 9 is number of months..not years
Kour Singh
2 years ago
bai ans. to fir b nhi aa rha.....plz clear
Nisha Sharma
2 years ago
Down payment that has been paid =1000 Remaining amount has to be paid = 5000 -1000 = 4000 Now this 4000 will be principal for 1st month Similarly, PA for 2nd month = 4000 - 500 = 3500 PA for 3rd month = 3500 - 500 =3000 and so on for 9 months So the principal amount is = 4000 + 3500 + 3000 +2500.......+ 500 ..that is the one month equivalent sum Now the SI will not be directly 500 which is paid every month...SI will be calculated as, Total amount being paid in 9 months = 9*500 =4500 The principal amount is =4000 So the extra amount paid is SI , that is 4500 - 4000 =500 So, PA = 18000 SI = 500 t = 1/12 Put everything in the formula, you'll get the answer.
18000 hahahahha pgl
Ashutosh Kumar
2 years ago
t=1/12?
Ashutosh Kumar
2 years ago
nisha sharma????
Shavinder kumar
a year ago
Yes ankit.....its 18000
Abhay Vishnoi
a year ago
18000 kese??
सर आपने बहुत ही बढ़िया से इस वीडियो में समझाया है इसके लिए शुक्रिया। आपकी मेहनत इस वीडियो में प्रदर्शित होती है सर । Percentage Chapter पे वीडियो बना दीजिए सर। Love you sir....
Reena borrowed 6450 at 5% simple interest repayable in 4 equal installments. What will be annual installment payable by him ? **** By using your method, after four years amount = 100+105+110+115= 430. 6450/430= 15 so the installment should be :- 100*15= 1500. but the correct answer is :- 1800. Where am I going wrong. Please reply. I am frequently getting stuck in installments questions. RA
Naveen Patil
3 years ago
Here 6450 given is the principal . Therefore first u need to calculate the amount using basic formula method then apply the method..
emi includes interest also so i think solution may be wrong
Gayatri Sharma
2 years ago
First calculate amount ..which is 7740 (4year ,5%, 6450 is principal ).. Now. . Apply ur solution 7740 /430=18 .. 100×18= 1800 ..here is the answer
Gayatri Sharma
2 years ago
6450 is principal ..don't consider it as amount
solution provided by gayatri is correct
Gayatri Sharma
2 years ago
I want to know that ..if 1800 is annual installment for 4 year ..so 1800×4=7200 is paid after 4 year !! So. What about 7740 ?
interest is applied on remaining amount.
Gayatri Sharma
2 years ago
ok
yes sir we liked the videos, and moreover it helped in solving the problems in a comparatively short period of time.
1. Tricks to solve questions on Simple Interest PRESENTED BY DHIRAJ SINGH CHAUHAN

2. About me O B.Sc.(Hons.) from BHU Varanasi O 24th rank in CGL-2015(tier 1+tier2) O Score: O tier 1-150 O tier 2- 347.25 O total-497.25 out of 600 O Course fee: CONTRIBUTE O Follow me on Unacademy at: https://unacademy.in/user/dhirajaryal

3. Question 10 What annual installment will discharge a debt of Rs. 770 which is due in 5 years at rate of 5 % SI per annum?

4. 120 5 5 0 770

5. Question 11 A TV with MRP 5000 is available in a down payment of Rs.1000 and 9 monthly installments of 500. What is Rate of simple interest?

6. 3 5 0 0 Total Amount uued OD 8XS Average amount = ve mounT 8x3 2- = 33 :