Please help me question 13,17,18,19,20

Please help me question 13,17,18,19,20 CÅ»mparing Quantities LI'wo successive discounts of and are offered on a television set whose selling price is 5620. Find its marked price. 12. In a sale offer. all items are available at a discount of 25%. Estimate the selling price ofa wall hanging whose list price ise 2154.52. Mrs Chopra bought a saree fore •1000 including sales tax. Ifthe price (exclusive of sales tax) of the saree ise 3850, find the rate of sales tax charged. 14. A sum of money deposited in a bank becomese 17640 in twoyears ande 18522 in threeyearsat the same rate of interest. The interest is compounded annually. Find the sum and the rate of interest. 15. Taruna borrowed twice the money borrowed by Nisha at the same rate of simple interest per annum for 5 years. If Nisha paid 53000 less than the interest paid by Taruna. find the money borrowed by both of them. 16. In how much time will the simple interest one 5000atarateof 12.5%bethesameas the simple interest on 6500 at the rate of 6.5% for 3 years? 7. mpute C.I. on 390625 for a year at 8% per annum when the interest is compounded semi- annually. 18 Megha borrowed asumofZ 15000at 7.5% perannumforayear.ealculatetheamounttobepaid after a year if the interest is compounded semi-annually. 19 Find the amount and the compound interest on 7500 for I— years at per annum. compounded semi-annually. The value ofa flat constructed at a cost of 1500000 is increasing at the rate of annum What will be its value after 2 years? 21. Thevalue ofa years, ifthe present value is | 8200? Explorer In everyday life, there are many quantities that are expressed in

Dear student
17) Principal,P=Rs390625Rate of interest,R=8% p.aTime,n=1 yearAmount,A=P1+R/21002nA=3906251+8/21002A=3906251+41002A=3906251041002A=Rs 422500So, Compound Interest,I=A-P=Rs(422500-390625)=Rs 31875
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