Question
Arun has 96 toy cars – some red and some black. If he
buys 36 more red toy cars, the ratio of red to black cars becomes 7:5. Find the number of red toy cars Arun initially had.Solution
Let the number of red and black toy cars after buying 36 more be '7x' and '5x' respectively. ATQ: 7x + 5x = 96 + 36 12x = 132 x = 11 Number of red toy cars after buying = 7x = 7 × 11 = 77 Number of red toy cars Arun initially had = 77 – 36 = 41
A can complete a piece of work in 18 days. B can complete the same work in 72 days. While C is 33(1/3) more efficient than B. All three started workin...
‘n’ men working 12 hours a day can complete a work in 15 days while (3n – 8) men working 12 hours a day can complete the same work in 9 days. In h...
A buffalo alone can plough field ‘A’ in 20 days. A Bull alone can plough the field ‘A’ in 32 days. Find the number of days taken by 2 bulls and ...
126 unit of work can be completed by P alone in 21 days. P started working alone and joined by Q after 10 days such that they completed the remaining wo...
‘D’ can type a document in 45 days, but ‘D’ and ‘E’ together can do it in 27 days. If ‘E’ worked for 15 days alone and then left, in how...
'A' and 'B' can together complete a job in 15 days. If 'B' alone can finish 50% of the job in 20 days, how long would it take 'A' alone to complete the ...
Manoj can complete a job in 10 days which Rakesh can do in 15 days. Rakesh can finish a task in 20 days which Suresh can complete in 25 days. In how man...
‘A’ alone can complete a work in 40 days while ‘A’ and ‘B’ together can complete the same work in 20 days. How much ...
- 'Amit', 'Ravi', and 'Neha' can finish a piece of work in 66, 99, and 132 days respectively. They all started the work, but Amit left 8 days before the work...
Ratio of the work done by P, Q and R in one day is 5:4:8 respectively. They all together can complete the work in 40 days. Q and R worked on it for 20 d...
Relevant for Exams:
