If h = 10 cm, c = 6 cm, b = 12 cm and d = 4 cm, find the values of each of its parts separately and add to find the area WXYZ..Verify, it by putting the values of h, a and b in the expression \(\frac { h(a+b) }{ 2 } \)

3

(a)

Divide the following polygons into parts (triangles and trapezium) to find out its area.

3

(a)

Length of the fence of a trapezium shaped field ABCD is 120 m. If BC = 48 m, CD = 17 m and AD = 40 m, find the area of this field. Side AB is perpendicular to the parallel sides AD and BC

3

(a)

Mohan wants to buy a  trapezium shaped field. Its side along the river is parallel and twice the side along the road. If the area of this field is 10500 m² and the perpendicular distance between the two parallel sides is 100 m, find the length of the side along the river.

3

(a)

There are two cuboidal boxes as shown in the following figures. Which box requires the lesser amount of material to make?

3

(a)

A suitcase with measures 80 cm\(\times\) 48 cm\(\times\)24 cm is to be covered with a tarpaulin cloth. How many metres of tarpaulins of width 96 cm is required to cover 100such suitcases?

3

(a)

Daniel is painting the walls and ceiling of a cuboidal hall with length, breadth and height of 15 m, 10m and 7 m, respectively. From each can paint of 100 m² of area is painted. How many cans of paint will she need to paint the room?

3

(a)

A road roller takes 750 complete revolutions to move once over to level a road. Find the area of the road, if the diameter of a road roller is 84 cm and length is 1m.

3

(a)

How many small cubes with edge of 30 cm each can be just accommodated in a cubical box of 3 m edge?

3

(a)

160m³ of water is to be used to irrigate a rectangular field, whose area is 800 m². What will be the height of the water level in the field?

3

(a)

How many iron rods each of length 14 m and diameter 4 cm can be made out of 88 m³ of iron?

3

(a)

The difference between two parallel sides of a trapezium is 8 cm. The perpendicular distance between them is 19 cm. While the area of trapezium is 760cm². What will be the length of the parallel sides?

3

(a)

Find the area of the following figures.

3

(a)

Find the area of a rhombus whose diagonals are of lengths 10 cm and 8.2 cm.

3

(a)

Find the area of the polygon ABCDE as shown in the figure.

3

(a)