The volume of a right circular cone is 3080 cm3 . If the radius of its base is 7 cm, then what is the height of the cone?\( \text{use } \pi = \frac{22}{7} \)
Find the difference between a discount of 30% on ₹2,000 and a discount of 40% on ₹5,000.
\( \tfrac{2}{7} \) of 40% of B = 48. What is the value of B?
Shreya was given an increment of 10% on her salary . Her new salary is ₹5,500. What was her salary before the increment?
The following table shows the number of cars manufactured in five consecutive weeks.
| Week | Number of cars manufactured |
| 1st week | 500 |
| 2nd week | 700 |
| 3rd week | 600 |
| 4th week | 300 |
| 5th week | 900 |
How many cars were manufactured in the first four weeks, taken together?