Question
In a family of 8, the men eat on average 50 kg of food
and women eat on an average 35 kg of food. The men and women are equal in number. A woman joined the family for dinner and the average consumption became 45. How much did woman eat (in kgs)?Solution
As men and women are equal so , there are 4 women and 4 men so, total consumption will be 50 × 4 = 200 (by men) and 35 × 4 = 140 (by women) Total consumption = 340 kg But after including a woman the average consumption for 9 people is given to be 45. So the total consumption will be 45 × 9 = 405 kg So, woman’s consumption will be = 405 – 340 = 65 kg
Two pipes A and B can fill a tank in 12 hours and 15 hours, respectively. Another pipe C can empty the tank in 10 hours. If all three pipes are opened t...
- Pipe 'A' is twice as efficient as pipe 'B'. Pipe 'C', which is one-third as efficient as pipe 'B', can fill a tank alone in 27 hours. Find difference betwe...
Pipe X and Y can fill a tank alone in 18 minutes and 24 minutes respectively. If all three pipes X, Y and Z together fill the tank in 8 minutes, find th...
Two pipes X and Y can fill a tank in 90 minutes and 60 minutes respectively. A third pipe Z can empty the tank in 2 hours 30 minutes. X is kept closed. ...
Pipe A and Pipe B together can fill the tank in 20 hours. The capacity of the pipe A is 25% of the capacity of the pipe B. How much time will pipe B alo...
Pipe ‘A’ can fill a tank in 60 hours whereas leak ‘A’ can empty it in 70 hours. If they both operate along with pipe ‘B’, then the given tan...
Pipe 'A' and pipe 'B', alone can fill a tank in 20 minutes and 30 minutes, respectively. Both the pipes were opened together to fill the tank, but later...
Pipes A, B, and C can fill a tank in 10 hours, 5 hours, and 20 hours respectively. If the efficiencies of pipes A and B are each reduced by 50% of their...
Two pipes M and N can fill a tank in 20 hours and 30 hours respectively. The pipes were opened together, but pipe N stopped working after sometime and t...
Pipe A can fill a tank in 10 hours, while Pipe B can fill it in 15 hours. Pipe C can empty the tank in 12 hours. If all three pipes are opened together,...
Relevant for Exams:
