Question
A certain amount becomes four times itself when invested
at r% per annum simple interest for 12 years. What is the value of r?Solution
ATQ,
Let the amount invested be Rs. x
According to the question,
Therefore, r = 25%
P invested Rs. 7,000 at a simple interest rate of 22% per annum, while Q invested an unknown sum at a compound interest rate of 2...
The simple interest on a sum of money is 8/25 of the sum. If the rate of interest per annum is two times of the number of years in numerically. Find the...
170, 158, ? , 122, 92, 50
If f(x) is periodic of period T, then:
If f(x) = 2x² – 3x + 1, find value of f(3) + f(–3).
The weights (in kg) of 11 students are:
40, 45, 47, 50, 52, 52, 55, 55, 55, 60, 65
Find:
(a) the mean weight,
(b) the median weight,
A man invests ₹20,000 in a scheme that offers a 10% simple interest per annum. After how many years will his total amount become ₹30,000?
A rectangular field has a length of 120 meters and a width of 80 meters. A pathway 2 meters wide is constructed along the inside edge of the field, all ...
A trapezoid has bases of lengths 10 cm and 20 cm and an area of 180 cm². Find the height of the trapezoid.
A share is to be distributed among A, B, C, D in the ratio 7 : 5 : 4 : 2. If C gets Rs 500 more than D, what will be the share of B?Â
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