For the following questions answer them individually
If $$\left(\frac{P}{2}\right) = \left(\frac{Q}{5}\right) = \left(\frac{R}{6}\right)$$, then what is the value of $$P^2 : (P + Q)^2 : (Q + R)^2$$
Two boats are travelling at the speed of 36 km/hr and 54 km/hr respectively towards each other. What will be the distance between the two boats one second before they collide?
A certain sum of money becomes triple of itself in 8 years at simple interest. In how many years it will becomes five times of itself?
Three partners P, Q and R share profit such that 4 times of the P's share is equal to 5 times of the Q's share and equal to 8 times of the R's share. What is the ratio of the profits of P, Q and R respectively?
Shreyas can complete 4/5 part of a work in 16 days. Ruchi is 2.5 times as efficient as Shreyas. In how many days will Ruchi alone complete the same work?
The table given below shows the marked price and selling price of 6 articles.
Discount Percentage = [(Marked price - Selling price)/Marked price] $$\times$$ 100
Which of the following sequence is correct of discount percentage?
The length, breadth and height of a cuboid are 4 cm, 6 cm and 10 cm respectively. Find the total surface area.
Cost price of an article is Rs. 2650. If the loss percentage is 16 percent, then what is the selling price of the article?