Question
Riya travels 45.5 km in 2 hours and 30 minutes. How much
distance will she cover in 4 hours if she increases her speed by 3 km/h?Solution
ATQ,
30 minutes = (30/60) = 0.5 hours
So, usual speed of Riya = (45.5 / 2.5) = 18.2 km/h
Increased speed of Riya = 18.2 + 3 = 21.2 km/h
Therefore, distance covered by her in 4 hours = 21.2 × 4 = 84.8 km
- An amount of Rs. 12,000 invested at simple interest for 4 years becomes Rs. 17,280. Calculate the annual rate of interest.
A sum is lent on compound interest for 2 years at 9% p.a. If the compound interest on the sum is Rs.2257.2, find the sum.
Rohit invested Rs. 3000 in scheme 'C' for 4 years and Rs. 4500 in scheme 'D' for 3 years. If the simple interest rate for both schemes is 15% per annum,...
- A certain sum was invested at simple interest. After 5 years, it became (117/ ninety) times the amount it had reached in 3 years. Find the annual rate of i...
Find the simple interest and the amount on Rs 4,000 at 9% per annum for 2 years.
"R" made certain investments with a 40% annual compound interest rate that is compounded quarterly. If, 9 months later, he receives Rs. 1,99,650, then t...
An initial principal sum of Rs. 8000, invested by Pranav, accrued interest at a compound rate of 20% annually for a period of 2 years. Subsequently, the...
A person invests ₹40,000 at a simple interest rate of 5% per annum for 2 years and reinvests the total amount, including interest, in a scheme offerin...
Mr. X invested Rs. 600 in two schemes, A and B in the ratio of 7:3, respectively. Scheme A and B are offering simple interest at rate of 16% per annum a...
Mr. P invested Rs. ‘8x’ in scheme ‘A’ offering simple interest of 25% p.a. and reinvested the interest earned from scheme ‘A’ at the end of ...
Relevant for Exams:
