Question
'Aman' and 'Bhanu' together can complete a work in 7.2
days. Both of them started the work but 'Bhanu' left the work after 3 days and remaining work was completed by 'Aman' alone in 7 days. Efficiency of 'Charu' is 50% more than the efficiency of 'Bhanu'. Find the time taken by 'Charu' to complete 80% of the workÂSolution
ATQ, Let the efficiency of 'Aman', 'Bhanu' and 'Charu' be 'p' units/day, 'q' units/day and 'r' units/day respectively. Total work = 7.2(p + q) units Work completed by 'Aman' and 'Bhanu' in 3 days = 3(p + q) units ATQ: 3(p + q) + 7p = 7.2(p + q) Or, 3p + 3q + 7p = 7.2p + 7.2q Or, 2.8p = 4.2q So, p:q = 3:2 Let 'p' = 3k and 'q' = 2k So, 'r' = 1.5 X 2k = 3k So, required time = [7.2 X (3k + 2k) X 0.80] ÷ 3k = 9.6 days
If p: q =1:3, q: r =2:1, r: s = 1:2, s: t =3:1 and t: u =1:4 then value of (p q r/s t u)3 =?
If the ratio of number of boys and girls present in the playground is 5:4. 10 boys left the playground, leaving total number of girls same as the boys p...
Total population of city P and Q is 3150 and 3640 respectively. If the ratio of number of males to females in city is P and Q is 5:4 and 4:3 respectivel...
If A:B = 7:6 and B:C = 12:15 respectively, then find the value of (A + C) :(A + B) .
A right triangle ABC with sides 5 cm ,12cm and 13cm is revolved about the side 12 cm. What is the volume of the solid so obtained?
A seller sold three types of fruits i.e. apples, bananas, and oranges. The number of apples sold is 30% of the total number of fruits sold, and the rati...
- If ‘A’, ‘B’ and ‘C’ are in proportion in the given order while ‘A’ = 12 and ‘B’ = 36, then find the value of ‘C’.
The ratio of the two numbers is 4:7. 110% of the first number is equal to the 80% of the second number. Find the sum of both the numbers.
What is the mean proportion between 9 and 36?
Rs 2106 was divided among Anil, Bhanu and Charan in the ratio of 13:10:16 respectively. Find the amount received by Anil and Bhanu together.