Monthly incomes to two persons are in ratio of 4 : 5 and their monthly expenditures are in the ratio of 7 : 9. If each saves Rs. 5000 a month, find their monthly incomes.
Tuesday, July 30, 2013
Ratio and proportion
Monthly incomes to two persons are in ratio of 4 : 5 and their monthly expenditures are in the ratio of 7 : 9. If each saves Rs. 5000 a month, find their monthly incomes.
ratio and proportion
The monthly salaries of two persons are in the ratio of 3 : 5. If each
receives an increase of Rs. 20000 in salary, the ratio is altered to 13 : 21.
Find the respective salaries.
ratio and proportion
The ratio of the present age of a father to that of his son is 5: 3. Ten
years hence the ratio would be 3: 2. Find their present ages.
Answer:
Ratio and proportion
Monthly incomes of two persons Ram and Rahim are in the ratio 5: 7 and their monthly expenditures are in the ratio 7: 11. If each of them saves Rs. 6000 per month find their monthly income.
mean
The average salary per day per head of all the employees in Enerjet is
Rs. 1600. The average salary per day per head of 12 officers is Rs. 2400. The
average salary per day per head of the rest is Rs. 800. Find the total number
of workers.
mean
A person drove his car for
first 30 km and then 40 km at an average speed of 50 km and 60 km per hour
respectively. At what speed must he drive next 50 km if the average speed of
the whole journey is 52km per hour
Mean
The average age of a class of 17 boys at the end of
a term was 14 years. Of these 5 left of the average age of 15 years, 4 months
later 6new boys of average age 13 years came into the class. What was the average
age of the class?
mean
In a class there are three divisions. The number of students and the
average marks in mathematics in the three divisions are 30, 40 and 30 and 40%,
30%, 50% respectively. What is the average mark in mathematics of the class?
Mean
The mean of 6 numbers (out of which 2 numbers are equal) is 40. If two
equal numbers are excluded, the mean becomes 56. Find the two missing numbers.
Mean
The average score of girls in the preliminary
examination is 75 and that of boys is 70. The average score of all the candidates in the examination is 72. Find the
ratio of number of girls and boys
that appeared in the
examination.
Monday, July 29, 2013
3-coordinate geometry ICSE 1996
Write down the equation of the line whose gradient is 3/2 and which
passes through P, where P divides the line segment joining A(-2, 6) and B(3,-4)
in the ratio 2:3.
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