For the following questions answer them individually
The compound interest on ₹18,000 at 7% per annum, compounded annually, is ₹1,260. What is the period of time?
When a watch is sold at $$\frac{7}{8}$$ th of the marked price, there is a profit of 25%. At what percentage more than the cost price has the marked price of the watch been fixed? [Give your answer correct to 2 decimal places.]
The average of a set of 15 consecutive even numbers is 64. What is the difference between the largest and the smallest numbers belonging to this set?
Aman goes from A to B at a speed of 40 km/h. Using the same route, he comes back from B to A, at a speed of 55 km/h. What is his approximate average speed for the whole journey?
A, B and C can do a piece of work in 10, 20 and 30 days, respectively. In how many days can A do the work if he is assisted by B and C on every third day?
The perimeter of a rectangle is 40 cm. If its breadth is 8 cm, then what is the difference between the length and breadth of this rectangle?
What is the value of $$\frac{\left[\left(\frac{5}{7} of \frac{1}{12} \times \frac{1}{4} - \frac{1}{2} \times \frac{1}{8}\right) + \frac{5}{4} \times \frac{8}{15} - \frac{2}{3}\right]}{\frac{1}{2} \div \frac{1}{4} + \frac{1}{2}}$$
A 750 metres long train crosses a stationary pole in 15 sec. Travelling at the same speed, this train crosses a bridge completely in 25 sec. What is the length of this bridge (in metres)?
The following bar chart shows the revenue (in thousand rupees) generated from the sale of 5 different objects, Q1 to Q5.
The following bar chart shows the profit percentage gained through the sales of these 5 objects.
Profit percentage$$ =\frac{Revenue - Cost}{Cost} \times 100$$
What is the cost incurred in the procurement and sale of Q1?