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Total height of 15 students of the class = 160 × 15 = 2400 cm When 6 new students joined the class, average height of each student = 160 + 4 = 164 cm Total height of 31 students of the class = 164 × 31 = 3444 cm Average height of 6 new students who joined the class = {(3444 – 2400)/6} = 1044/6 = 174 cm
If Rs. 12,500 is invested at simple interest for 2.5 years and the total amount becomes Rs. 15,625, what is the rate of interest per annum?
A sum of money is invested at an annual simple interest rate of 15% for a period of 3 years, yielding a total interest of Rs. 1350. Determine the princi...
The simple interest earned on a principal of Rs. 6400 at an annual interest rate of (p + 4)% for 3 years is the same as the simple interest earned on a ...
The simple interest on ₹1,280 at 5% p.a. for 3 years is:
The amounts invested by 'P' and 'Q' in Funds 'X' and 'Y' are in the ratio of 8:5. If 'P' invested ₹4800 more than 'Q,' determin...
Vaishali invested Rs. (X + 3000) on compound interest of r% p.a. compounded annually for 2 years and Tanushi invested Rs. (X – 2000) on simple interes...
If a sum when placed at compound interest grows to Rs.6,400 in 2 yrs and to Rs. 8,000 in 3 yrs, find the rate percent p.a.
...Rs. 25200 is invested in 3 parts in such a way that Simple Interest on 1st Part at 4% per annum for 3 years, Simple Interest on 2nd part at 6% per annum...
A sum lent out at simple interest amounts to 6076 in 1 year and 7504 in 4 years. The sum and the rate of interest p.a. are respectively
At what annual compound interest rate will a principal amount of Rs. 16,000 grow to Rs. 25,000 in 2 years?
