Question
A man donated 15%, 20% and 23% of his income to three
NGOs ‘A’, ‘B’ and ‘C’, respectively. They spent 75%, 80% and 50% of respective sums received by them. If total sum left with three NGOs is Rs. 3850, then find the income of man.Solution
Let the income of the man be Rs. x Therefore, sum donated to NGO ‘A’ = Rs. 0.15x Sum left with NGO ‘A’ = 0.25 × 0.15x = Rs. 0.0375x Sum donated to NGO ‘B’ = Rs. 0.20x Sum left with NGO ‘B’ = 0.2 × 0.20x = Rs. 0.04x Sum donated to NGO ‘C’ = Rs. 0.23x Sum left with NGO ‘C’ = 0.5 × 0.23x = Rs. 0.115x According to the question, 0.0375x + 0.04x + 0.115x = 3850 Or, 0.1925x = 3850 Or, x = 3850/0.1925 = 20000 Therefore, income of man = Rs. 20000
If base of a prism is square of side 8 cm & height is 20 cm . What is the volume of prism?
If 2156 is added in a number then number become 344(4/9)% of itself. Find the original number?
The volume of a cube is 216 cm³. If the cost of painting the cube is Rs. 12 per cm², then find the cost of painting five faces of the cube.
A rectangular water tank is 80 m x × 40 m. Water flows into it through a pipe of 40 sq.cm at the opening at a speed of 10 km/hr. The water level will ...
A cuboid has length 10 cm, breadth 8 cm and height 6 cm. What is its volume?
The diameter of the base of a cylindrical drum is 70 cm and its height is 15 cm. The drum is full of water and the water from the drum is transferred to...
A cube of 25 cm side is divided into 125 smaller cubes of equal volume. Find the side of smaller cubes:
The cost of fencing a rectangular field at the rate of Rs. 4/metre is Rs. 360. If the length of the field is 13 metres more than its breadth, then find ...
The area of a rhombus is 168 cm2. The length of one of its diagonals is 28 cm. The length of the other diagonal is:
Curved surface area of cylinder is 646.8 cm2. If ratio of radius to height of the cylinder is 10:4 respectively, then find the base area of t...
