WBCS Mains 2018 Official Paper-VI

A man bought a house for Rs. $5$ lakhs and rents it. He puts $12\frac{1}{2}\%$ of each month’s rent aside for repairs, pays Rs. $1660$ as annual taxes and realises $10\%$ on his investment thereafter. The monthly rent of the house is

A trader mixes three varieties of groundnuts costing Rs. $50$, Rs. $20$ and Rs. $30$ per kg in the ratio $2:4:3$ in terms of weight and sells the mixture at Rs. $33$ per kg. What percentage of profit does he make?

Which of the following ratios is greatest?

If the edge of a cube is increased by $25\%$ then percentage increase in its surface area is

A river $1.5\text{m}$ deep and $36\text{m}$ wide is flowing at the rate of $3.5\text{km}$ per hour. The amount of water that runs into the sea per minute (in cubic meter) is