Mathematics
The adjoining figure shows the cross-section of a concrete wall to be constructed. It is 1.9 m wide at the bottom, 90 cm wide at the top and 5 m high. If its length is 20 m, find :
(i) the cross-sectional area;
(ii) the volume of the concrete in the wall.
Related Questions
A swimming pool is 30 m long and 12 m broad. Its shallow and deep ends are 1.5 m and 3.5 m deep respectively. If the bottom of the pool slopes uniformly, how many litres of water will fill the pool?
The cross-section of a piece of metal 2 m in length is shown in the adjoining figure. Calculate :
(i) the area of its cross-section;
(ii) the volume of piece of metal;
(iii) the weight of piece of metal to the nearest kg, if 1 cm3 of the metal weighs 6.5 g.
The cross-section of a 6 m long piece of metal is shown in the figure. Calculate :
(i) the area of the cross-section
(ii) the volume of the piece of metal in cubic centimeters.
The square brass plate of side x cm is 1 mm thick and weighs 5.44 kg. If 1 cm3 of brass weighs 8.5 g, find the value of x.