Question
If the height of a cylinder is doubled and radius is
reduced by 75%, then what is the percentage change in its volume?Solution
ATQ, Volume of cylinder = πr²h Height = 1 : 2 Radius = 4 : 1 Ratio = 16 : 2 = 8 : 1 Change = 1 × 100 / 8 = 12.5% 100 – 12.5 = 87.5%
The simple interest received on a certain sum is Rs. 500 less than the sum invested. If the sum was invested at 10% p.a. for 6 years, then find the simp...
A person invests ₹25,000 in two schemes A and B. In scheme A, he gets 15% simple interest per annum, and in scheme B, he gets 18% simple interest per ...
A sum of Rs. 100 is invested at 10% per annum compound interest (compounded annually) for two years. How much interest will be received after two years?
What will be the amount if a sum of Rs. 5000 is placed at compound interest for 3 years while the rate of interest for the first, second and third years...
The simple interest received on a certain sum is Rs. 1200 less than the sum invested. If the sum was invested at 20% p.a. for 4 years, then find the sim...
‘P’, ‘Q’ and ‘R’, each of them invested Rs. 2000 at the rate of 16% p.a., 24% p.a. and 36% p.a., respectively for 8 years, 3 years and 6 yea...
An investment of Rs. 8,430 is made in a Mutual Fund, offering a 10% per annum simple interest rate for 'p' years, while another investment of Rs. 8,800 ...
- A total of Rs. 17400 is shared between 'X' and 'Y' in the ratio 11:7. If 'Y' invests his portion in a compound interest scheme at a rate of 10% per annum, ...
A bank provides a loan at the rate of 5% per annum to a trader on an amount of 12,50,000 for 5 years. The simple interest to be paid is:
Simple interest and compound interest (compounded annually) earned on a sum at the end of 2 years at a certain rate of interest p.a. are Rs. 4500 and Rs...
