grade 8 Factorisation, mensuration and exponents

A TV set was bought for Rs 26,250 including 5% VAT. The original price of the TV set is

In a factory, women are 35% of all the workers, the rest of the workers being men. The number of men exceeds that of women by 252. Find the total number of workers in the factory

Volume of a rectangular box (cuboid) with length = 2ab, breadth = 3ac and height = 2ac is

The standard form for 0.000064 is

Under the condition that the temperature remains constant, the volume of gas is inversely proportional to its pressure. If the volume of gas is 630 cubic centimetres at a pressure of 360 mm of mercury, then what will be the pressure of the gas if its volume is 720 cubic centimetres at the same temperature?