Question
A man borrowed Rs 300 and promised to pay back in 11
equal instalments of Rs 30 each. Find the rate of simple interest per annum?Solution
First month = Rs 300 Second month = Rs 270 Third month =Rs 240 Sum = (n )/2{2a +( n – 1 )d] a = 300 d = - 30 ⇒ 11/2 [2 × 300 + (11 – 1) (-30)] ⇒ 11/2 [600 – 300] ⇒ 11/2 × 300 = 1650 P = (300 ×11)/2 = 1,650 (P ×R ×T)/100 = S.I (1650 ×R ×1)/(100 ×12) = 30 R = (12 × 20)/11 = 240/11 %
55-litres of paint is added to a mixture of paint and oil in the ratio 3:5. The ratio of paint and oil in the resulting mixture is 4:3. Find the total v...
X, Y, and Z entered into a partnership with initial investments of Rs. (M + 2500), Rs. 3M, and Rs. (4M - 20000), respectively. After 6 months, W joined ...
- VLC Media Player is an example of which category of application software?
A car covers the first 40 km of a journey at 60 km/h and the next 60 km at 90 km/h. What is the average speed for the entire journey?
If sin⁴ x + cos⁴ x = 5/8, then the value of sin2x is
Which of the following matrices is both symmetric and skew-symmetric?
- A shopkeeper makes a profit of 25% by selling an item for Rs. 500. What should be the selling price to make a profit of 40%?
Ten years from now, the ages of A and B will be in a ratio of 7:9. C's current age is half of B's current age. Five years from now, the ratio of C's age...
In the figure, ABCD is a cyclic quadrilateral with O as center of the circle If ∠ BOC = 136°, find ∠ OBC.
The average age of Vimal and Kamali is 24 years, and the ratio of Kamali's age to Surya's age is 4:5. If the average age of Vimal, Kamali, and Surya is ...
