A certain loan was returned in two equal half-yearly installments each of ₹6,760. If the interest rate was 8% p.a., compounded annually, how much was the interest paid on the loan?
A shopkeeper allows 18% discount on the marked price of an article and still makes a profit of 25%. If he gains ₹106.6 on the sale of the article, then what is the marked price of the article?
P and Q completed a work together and were paid ₹1,080 and ₹1,440, respectively. If P can do the entire work in 20 days, how many days did they take to complete the work together?
From an aeroplane just over a river, trees on the opposite bank of the river are found to be 60° and 30° respectively. If the breadth of the river is 400 m, then the height of the airplane above the river at an instant is (assume √3 = 1.732)
Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A is opened first, then the tank shall be filled in: