Question
Rs. (4x + 200) is invested at a simple interest rate of
18% per annum, earning an interest of Rs. 2160 after 4 years. Calculate the interest earned when Rs. (5x - 100) is invested at the same rate for the same period.Solution
Given Data: Principal = 4x+200 Interest earned = Rs. 2160 Rate = 18% per annum Time = 4 years Calculate 'x' by Using the simple interest formula: 
Simplify to find x=700. New Principal: Substitute x=700 into 5x−100: 5(700)−100=3400 Calculate New Interest: Use the simple interest formula again 
The interest earned on Rs. 3400 is Rs. 2448.
A cylindrical tank has a radius of 7 meters and a height of 10 meters. Calculate the volume of the tank. [Take π = 22/7 ]
The outer radius of a hollow metallic spherical ball is 12cm while the thickness of the metal used to make it is 8 cm. Find the volume of the metal used...
Two sides of the triangle are 14.8 cm and 10 cm. If height of the triangle corresponding to 14.8 cm side is 8 cm find the area?
...(190/3)% of the raindrops could have been collected, when 2 cm of rain has fallen on a part of land of area 3 km2, in a tank having a 200 m &...
The radius of a cone matches the radius of a circle with an area of 1386 cm². The slant height of the cone is twice the length o...
Find out the volume of a tetrahedron whose side is 6√2 cm³?
The height of a sphere is 28 cm. Find the surface area of the given sphere. (Take π = 22/7)
A cone has a height of 28 cm. A sphere is melted to form this cone. If the radius of the sphere is 7 cm, find the radius of the base of the cone.
A field is 125m long and 15m wide. A tank 10m ×7.5m×6m was dug in it and the earth thus dug out was spread equally on the remaining field. The level o...
The average weight of five friends A, B, C, D and E is (x+8) years while the average weight of C and E is (x-8) kg. If the weight of another person F is...
Relevant for Exams:
