The perimeter of a rhombus is 68 cm and one of its diagonals is 30 cm. Its area is:
A conical tent of height 8 m and radius 15 m is to be built in a tracking camp. How much area of cloth is needed?
Ramesh sold a watch to Rahul at a gain of 10%, and Rahul sold it to Arun at a loss of 10%. If Arun paid ₹1,800 to Rahul, then for how much did Ramesh sell it to Rahul?