Introduction to ratio and percentages - class-VIII
Description: introduction to ratio and percentages | |
Number of Questions: 29 | |
Created by: Girish Devgan | |
Tags: comparing quantities maths |
6 dozen eggs are bought for Rs. 48. How much will 132 eggs cost ?
The food stocks in a hostel are sufficient for 1200 students for 20 days . If 400 more students joined the hostel , the stocks just for ... days .
The time taken (in hours) by a car to travel $900km$ if it travels $600 km $ in $12 hrs$.
If 10% of x=20% of y, then $x:y$ is equal to
$33\dfrac { 1 }{ 3 } %\quad of\quad 1\dfrac { 1 }{ 2 } $ minute is equal to ___
What is the sum of two numbers?
I. The bigger of these two numbers is 6 more than the smaller number.
II. 40% of the smaller number is equal to 30% of the bigger number.
III. The ratio between half of the bigger number and one-third of the smaller number is 2 : 1
The difference between simple interest and compound interest on a certain sum of money for 3 years at 5% per annum is Rs. 122. Find the sum
Two cats Billy and Kitty together catch 60 mice. If Billy catches three mice for every two caught by Kitty, the number of mice caught by Kitty is
A person spent Rs 564 in buying geese and ducks. If each goose costs Rs 7, each duck Rs 3, and if the total number of birds bought was 108, how many of each did he buy?
A person invested Rs 1,600 for 3 years and Rs 1,100 for 4 years at the same rate of simple interest. The total interest from these investments was Rs 506. Find the rate percent per annum
A man saves 20% of his monthly salary. If on account of increase in prices, he is to increase his monthly expenses by 20%, he is only able to save Rs 800 per month. His monthly salary is
Alfred buys an old scooter for Rs. $4700$ and spends Rs. $800$ on its repairs. If he sells the scooter for Rs. $5800$, his gain percent is:
If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?
A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is
A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be
36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?
If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
Ravi and Kumar are working on as assignment. Ravi takes $6$ hours to type $32$ pages on a computer, while Kumar takes $5$ hours to type $40$ pages. How much time will they take, working together on two difference computers to type an assignment of $110$ pages?
Sakshi can do a piece of work in $20$ days. Tanya is $25$% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
There are four numbers whose product is $9261000$ and each of these four numbers is formed by $3$ distinct prime numbers. The average of all the four numbers is:
A shopkeeper offers a discount of 25% on a T.V and sells it for Rs.8400. What is the cost price of the T.V?
The temperature of a metal coin is increased ny $100^0$C and its diameter by 0.15%. Its area increases by nearly
If the volume of a sphere increases by 72.8%, then its surface area increases by
The given table shows the prices of 3 different types of eggs $\displaystyle \frac{1}{4}$ of the eggs Priyanka bought were chicken eggs $\displaystyle \frac{1}{8}$ of them were century eggs and the rest were quail eggs If Priyanka spent a total amount of Rs. 6.50 on the chicken and century eggs how much did she spent on the quail eggs?
Chicken eggs | 20 paise each |
---|---|
Century eggs | 90 paise each |
Quail eggs | 5 paise each |
On selling $17$ balls at $Rs. 720$, there is a loss equal to the cost price of $5$ balls. The cost price of a ball is:
If selling price is doubled, the profit triples. Find the profit percent.
Two pipes A and B can fill a tank in $15$ minutes and $20$ minutes respectively. Both the pipes are opened together but after $4$ minutes, pipe A is turned off. What is the total time required to fill the tank?
What is the percent profit earned by the shopkeeper on selling the articles in his shop?
I. Labeled price of the article sold was $130$% of the cost price.
II. Cost price of each article was $Rs. 550$.
III. A discount of $10$% on labeled price was offered.
If the diameter of a sphere is decreased by $25\%$, by what percent does its curved surface area decrease?