Refer to the given table and answer the question that follows.
| Items | Monthly expenses (in thousands) |
| Labour | 30 |
| Raw materials | 60 |
| Interest | 50 |
| Rent | 40 |
Raw materials and labour are how much percent of the total expenses?
In a factory, the average monthly salary of 25 unskilled workers is ₹11,950, that of 20 mechanics is ₹24,000 and that of 5 supervisors is ₹35,000. The average monthly salary of all the employees is:
The circumference of the edge of a hemispherical oil vessel is 396 cm. \(\frac{1}{3}\) of the vessel is empty. This oil needs to be poured into small hemispherical bowls each having a diameter of 2.1 cm. How many bowls will be required? \(\text{(Take } \pi = \frac{22}{7}\text{)}\)
A trapezium has parallel sides 6 units and 10 units. Other two opposite sides are of same length 8 units and two diagonals are of equal length. What is the area of the trapezium (in square units)?
\(32\sqrt{5}\)
\(16\sqrt{3}\)
\(32\sqrt{3}\)
\(16\sqrt{15}\)
A person divided a certain sum among his three sons in the ratio 3 : 4 : 5. Had he divided the sum in the ratio \(\frac{1}{3} : \frac{1}{4} : \frac{1}{5}\), the son, who got the least share earlier, would have got ₹1,188 more. The sum (in ₹) was: