For the following questions answer them individually
In an examination A scored 25% of marks and failed by 30 marks whereas B scored 50% of the marks and got 20 marks more than the minimum pass marks. What is the minimum percentage of the pass marks?
A man bought a horse and a carriage for Rs.3000. He sold the horse at a gain of 20% and the carriage at a loss of 10%, thereby gaining 2% on the whole. The cost of the horse is (in Rs.)
The profit earned by selling an article for Rs.900 is double the loss incurred when the same article is sold for Rs.450. At what price should the article be sold to make 25% profit?
P, Q and R together started a business. P invests three times as much as Q and Q invests two third of what R invests. What is the share of Q, if the total profit is Rs.12100 (in rupees)?
A, B, C, D start a partnership business where A, B and C invested $$\frac{1}{3}rd,\frac{1}{4}th$$ and $$\frac{1}{4}th$$ of the capital respectively and the rest of the capital by D. If the total profit at the end of the year is Rs.60 lakhs, what is the profit of D (in lakhs) ?
Pipe A and B can fill an empty tank in 6 hours and 9 hours respectively. If Pipe A is opened at 10 pm and B one hour thereafter then the tank will be fill ed at
A tank supplies water to a family for 50 days. Due to leak in the tank, 5 litres of water wastage every day and then the supply lasts for 10 days less. For how many days the supply last if 50 litres of water wastage every day?
Two persons A and B start from a point P and walk at the speeds 3 kmph and 4 kmph respectively. B reaches the point Q and returns immediately to meet A at a point R in between P and Q. If P, Q R are collinear, then the distance between Q and R (in km) is
Walking at $$\frac{3}{4}$$ of his usual speed a person reaches his office 10 minutes late. What is the time (in minutes) taken by him to reach his office if he walks at his usual speed?
P works twice as fast as Q and R work together. Working together, all three can do a work in 21 days. In how many days can Q and R together do the work?