Chapter 13 – Surface Areas and Volumes
2. Find the surface area of a sphere of diameter: (iii) 3.5cm
17
Oct
2. Find the surface area of a sphere of diameter: (iii) 3.5cm 2. Find the surface area of a sphere of diameter: (iii) 3.5cm October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
2. Find the surface area of a sphere of diameter: (ii) 21cm
17
Oct
2. Find the surface area of a sphere of diameter: (ii) 21cm 2. Find the surface area of a sphere of diameter: (ii) 21cm October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
2. Find the surface area of a sphere of diameter: (i) 14cm
17
Oct
2. Find the surface area of a sphere of diameter: (i) 14cm 2. Find the surface area of a sphere of diameter: (i) 14cm October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
1. Find the surface area of a sphere of radius: (iii) 14 cm
17
Oct
1. Find the surface area of a sphere of radius: (iii) 14 cm 1. Find the surface area of a sphere of radius: (iii) 14 cm October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
1. Find the surface area of a sphere of radius: (ii) 5.6cm
17
Oct
1. Find the surface area of a sphere of radius: (ii) 5.6cm 1. Find the surface area of a sphere of radius: (ii) 5.6cm October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
1. Find the surface area of a sphere of radius: (i) 10.5cm
17
Oct
1. Find the surface area of a sphere of radius: (i) 10.5cm 1. Find the surface area of a sphere of radius: (i) 10.5cm October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
8. A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs. 12 per m^2, what will be the cost of painting all these cones? (Use π = 3.14 and take √(1.04) =1.02)
17
Oct
8. A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs. [...]
7. A joker’s cap is in the form of right circular cone of base radius 7 cm and height 24cm. Find the area of the sheet required to make 10 such caps.
17
Oct
7. A joker’s cap is in the form of right circular cone of base radius 7 cm and height 24cm. Find the area of the sheet required to make 10 such caps. 7. A joker’s cap is in the form of right circular cone of base radius 7 cm and height 24cm. Find the area [...]
6. The slant height and base diameter of conical tomb are 25m and 14 m respectively. Find the cost of white-washing its curved surface at the rate of Rs. 210 per 100 m^2.
17
Oct
6. The slant height and base diameter of conical tomb are 25m and 14 m respectively. Find the cost of white-washing its curved surface at the rate of Rs. 210 per 100 m^2. 6. The slant height and base diameter of conical tomb are 25m and 14 m respectively. Find the cost of white-washing its [...]
5. What length of tarpaulin 3 m wide will be required to make conical tent of height 8 m and base radius 6m? Assume that the extra length of material that will be required for stitching margins and wastage in cutting is approximately 20 cm. [Use π=3.14]
17
Oct
5. What length of tarpaulin 3 m wide will be required to make conical tent of height 8 m and base radius 6m? Assume that the extra length of material that will be required for stitching margins and wastage in cutting is approximately 20 cm. [Use π=3.14] 8. In a hot water heating system there [...]