Question
The ratio of the expenditure to the savings of Richa is
2 : 1. If her income and expenditure increase by 20% and 15%, respectively, then find the percentage increase in her savingsaSolution
Let her initial expenditure and savings be 2k and k respectively. Her initial income = 2k + k = 3k Her final income = 3k× (1 + 20%) = 3.6k Her final expenditure = 2k x (1 + 15%) = 2.3k Her final savings = 3.6k- 2.3k = 1.3k Now, % change in savings = (k-1.3k/k) x 100% = 30%
- A rectangle has a perimeter of 160 cm. Its breadth is 40% less than its length. Calculate the area (in cm²) of a square whose side is 20 cm shorter than t...
A train 130 meters long travelling at 54 km/hr crosses the bridge in 30 sec. Then the length of the bridge is:
Which of the following numbers is a divisor of (4915 – 1)?
A rectangular plot has an area of 490 m². If the length of the rectangular plot is 24.5 m. Find the perimeter of the rectangular plot.
Find the length of the diagonal of a cube with volume 81√3 cm³?
The sum of the areas of a rectangle and a square is 161 cm². The breadth of the rectangle is 1 cm more than each side of the square. If the length of t...
A cylindrical roller of diameter 1.6 metres and length 2.4 metres makes 15 revolutions per minute. What area can it cover in 10 minutes?
The diameter of the base of the cylindrical drum is 35Dm and the height is 24Dm. It is full of kerosine. how many tins each of size 25cm ×22cm ×35cm c...
The volume of cone is 1617 cm3. If its height is 3.5 cm then find the radius of the cone.
In a class of 50 students and 20 teachers, each student got gifts that were 24% of total number of students and each teacher got gifts that were 16% of ...
Relevant for Exams:
