Question
A man invested Rs. 'C' at simple interest of 20% and Rs.
'C + 2000' at simple interest of 16% p.a., for 3 years each. If the interest earned from both investments is the same, then find the sum invested at the lower rate of interest.Solution
ATQ, Simple interest = Sum X rate of interest X time period of investment ÷ 100 ATQ; 
Or, 6C=(C+2000)×4.8 Or, 6C=4.8C+9600 Or, 1.2C=9600 Or, C=8000 So, sum invested at lower interest = 8000 + 2000 = Rs. 10,000
The radius of the incircle of a triangle is 10 cm. if the area of the triangle is 60 cm 2 , then its perimeter is?
In the figure given below, AC = 16 cm and BF = 5 cm. If AE:CE = 5:3, then find the perimeter of ΔABC.
What is the angle traced by the hour hand in 18 minutes?
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The length of the each side of an equilateral triangle is 7√3 cm . The area of circumcircle, (cm 2 ) is
∆ABC and ∆DEF are similar and their areas are respectively 16 cm2 and 64 cm 2 . If EF = 6 cm BC is?
in the given figure, ABCD is a square whose side is 4 cm. P is a point on the side AD. What is the minimum value (in cm) of BP + CP ?
In a rectangle, length : breadth = 4 : 3. What is the value of length : diagonal?
The radius of a sphere is 12cm. The surface of the sphere is what percent of its volume
