Question
A man deposited 40% of his salary to a bank which offers
compound interest at the rate of 10% p.a. If the interest earned by him from the bank after 2 years is Rs. 3990, find the monthly expenditure of the man which is 55% of his monthly salary.ÂSolution
Let the amount of money deposited in the bank be Rs. ‘x’. So, x × [(1.1)2 – 1] = 3990 0.21x = 3990, x = 19000 So, monthly income of man = 19000/0.4 = Rs. 47500 Required monthly expenditure of man = 55% of 47500 = Rs. 26125
The lengths of three medians in a triangles are 30 cm, 40 cm, 50 cm. What is the area of that traingle (in cm 2 )?
Let A, B, and C be the mid-points of sides PQ, and QR PR, respectively, of ΔPQR. If the area of ΔPQR is 64cm², then find the area of ΔABC.
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In a parallelogram, two adjacent angles are (3x + 10)° and (x + 30)°. Find the larger angle.
If I is the incentre of ΔABC , if ∠BAC = 300 , then what is the measure of ∠BIC?
The length of the each side of an equilateral triangle is 28√3 cm . The area of circumcircle, (cm 2 ) is
In ∆ABC , G is the centroid , AB = 6 cm, BC= 8 cm and AC = 10 cm , find GD, where D is the mid-point of BC?
The length of the each side of an equilateral triangle is 14√3. The area of incircle, (cm 2 ) is
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