A small terrace at a football ground comprises of 15 steps each of which is 50 m long and built of solid concrete. Each step has a rise of `(1)/(4)` m and a tread of `(1)/(2)` m Calculate the total volume of concrete required to build the terrace.

A small terrace at a football ground comprises of 15 steps each of which is 50 m long and built of solid concrete. Each step has a rise a 1/4 m and a tread of 1/2 m. (sec Fig.). Calculate the total volume of concrete required to build the terrace. [ Hint : Volume of concrete reuqired to build the first step = 1/4 xx 1/2 xx 50 m^(3) ]

Find the volume of each of the cube whose sides are. 1.2 m

Calculate the pH of 10mL of 0.1M each H_2 SO_4 and KOH present in a mixture.

Five square flower beds each of side 1m are dug on a piece of land 5m long and 4 m wide. What is the area of the remaining part of the land?