For the following questions answer them individually
In examination a student A, got 20% less than the qualifying mark and mother student B got 20% more than the qualifing mark. If the difference of their obtained marks is 30, then the ratio of the marks obtained by A and B is
If the cost price of 8 bananas is equal to the selling price of 9 bananas, the loss/gain percentage is
By selling an article for Rs. 1725, a merchant gets a loss of 8%. Had he sold the same for Rs. 2100, the profit percent he gets is
A invested a certain amount in a business with B as a partner. A looks after the management of the business and takes 10% of the profit as his remuneration. If B invests Rs. 12,000 and A gets a total of Rs. 4200 which includes his remuneration from the profit of Rs. 9600, then the investment of A (in thousands of Rs.) is
Y started a business by investing an amount of Rs. 45,000. After 3 months P joined him with a capital of Rs. 60,000. After another 6 months X joined them with a certain amount a, capital. At the end of the year, if X's share is Rs. 4000 out of a profit of Rs. 20,000, then the investment of X(in Rs.) is
Two pipes A and B can fill a cistern independently in 12 min and 15 min, respectively. A pipe C at the bottom of the cistern empties the tank. When all the three pipes are opened, the cistern will be filled in 20 min. A pipe D fixed at the bottom of the cistern working along with A, B and C will empty the full cistern in 20 min. The time taken by D (in minutes) to empty the full cistern independently is
Two pipes P and Q can fill a tank in $$1\frac{1}{2}$$ hours and $$2\frac{1}{2}$$ hours respectively. When both the pipes are opened in order to fill the tank in 2 hours, the pipe P must be turned off after
Two buses start from stations A and B at the same time and travelled towards each other at speeds of 50 kmph and 60 kmph respectively. By the time they meet each other, one bus travelled 120km more than the other. They continued their journey to the stations B and A respectively. By the time one of the buses reach its destination, the distance (in kms.) to be covered by the other bus to reach its destination is
A student starts form his house to his school far away by $$1\frac{3}{4}$$ km, reached 6 minutes late travelling with a speed of $$2\frac{1}{2}$$ kmph. The speed by which he has to increase so as to reach the school 6 min early (in kmph) is
16 men by working 5 hours a day can complete a work in 15 days. 20 men by working 3 hours a day could complete one fourth of that work in $$x$$ days. If the working hours per day is fixed at 9 hours, and the number of men required to complete the remaining $$\frac{3}{4}$$ of the work in 4 days is y, then ($$x$$, y)=