Sadhana Bhadoriya

Ex – 9.2 Que No. 5 Q.5) Daniel is painting the walls and ceiling of a cuboidal hall with length, breadth, and height of 15 m, 10 m and 7 m respectively. From each can of paint 100 m2 of area is painted. How many cans of paint will she need to paint the room? […]

Ex – 9.2 Que No. 4 Q.4) Rukhsar painted the outside of the cabinet ofmeasure 1 m × 2 m × 1.5 m. How much surface area did she cover if she painted all except the bottom of the cabinet. Solution:-

Ex – 9.2 Que No. 3 Q.3) Find the side of a cube whose surface area is 600 cm2. Solution:-

Ex – 9.2 Que No. 2 Q.2) A suitcase with measures 80 cm × 48 cm × 24 cm is to be covered with a tarpaulin cloth. How many metres of tarpaulin of width 96 cm is required to cover 100 such suitcases? Solution:-

Ex – 9.2 Que No. 1 Q.1) There are two cuboidal boxes as shown in the adjoining figure. Which box requires the lesser amount of material to make? Solution:- The box with a smaller surface area will require less material. After comparing the surface area of both boxes (a) and (b), we find that the

Ex – 9.1 Que No. 11 Q.11) Diagram of the adjacent picture frame has outer dimensions = 24 cm × 28 cm and inner dimensions 16 cm × 20 cm. Find the area of each section of the frame, if the width of each section is same. Solution:-

Ex – 9.1 Que No. 10 Q.10) There is a pentagonal shaped park as shown in the figure. For finding its area Jyoti and Kavita divided it in two different ways. Solution:- By Jyoti’s diagram – By Kavita’s diagram –

Ex – 9.1 Que No. 9 Q.9) Top surface of a raised platform is in the shape of a regular octagon as shown in the figure. Find the area of the octagonal surface. Solution:-

Ex – 9.1 Que No. 8 Q.8) Mohan wants to buy a trapezium shaped field. Its side along the river is parallel to 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