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:
Three successive discounts of 40%, 25% and 20%, respectively, on the marked price of a chair, are equal to a single discount of Rs.960. The marked price (in Rs) of the chair is:
An article is sold at a certain price. If it is sold at 80% of this price, then there will be a loss of 10%. What is the percentage profit when the article is sold at the original selling price?
Rs 8,000 amounts to Rs 9,159.20 in ‘t' months at 14% per annum interest being compounded half-yearly. What will be the amount (in ₹ nearest to an integer) in ‘t + 9' months on a sum of ₹ 10000 at 16% pa if the interest is compounded 9-monthly?