Question
A, B, and C can finish work in 5 days, 10 days, and 15
days, respectively, working alone. A and B work on the first day, A and C work on the second day, A and B work on the third day, and so on till the work is completed. In how many days the work will be completed?Solution
Working fashion=(A+B) + (A+C) +(A+B) …. Working in 2days = (6+3+6+2) =17 3days =17+9=26unit Remaining work =30-26=4unit Remaining work 4units is done by (A+C) 4days =4/8=1/2 days Total days= 3+1/2=7/2days .
- Find the third proportion of 15.2 and 19.
Samir distributed 625 gifts among 4 children. The first part of the child is twice the portion of the other child, three times the size of the third chi...
The ratio of the number of cats and dogs in a pet store is 7:3, respectively. If 50% of cats are Siamese and 70% of dogs are Labradors, find the ratio o...
The ratio of the number of boys to the number of girls in a school of 640 students, is 5 : 3. If 30 more girls are admitted in the school, then how many...
If A:B = 4:5 and C:B = 3:4, then determine the value of (A:B:C) .
Rohit, Manish, Suresh, and Arjun were playing a football match. The ratio of goals scored by Rohit and Manish was 6:9 respectively, while that between M...
L’s income is 125 percent of M’s income and L’s expenditure is 120 percent of M’s expenditure. If L’s income is 180 percent of M’s expenditu...
The total number of students in a school is 21980. If the ratio of boys to the girls in the school is 70:87 respectively, then find the total number of ...
The ratio of tea cups to coffee cups in a canteen is 6:5. If 18 tea cups are broken and 12 new coffee cups are added, the count of both becomes equal. F...
- If 70% of (P - Q) is the same as 35% of 80% of (P + Q), then what is the ratio of Q to P?