3.The sum of the parallel sides of the trapezium = 180*2/12 = 30 cm. The parallel sides of the trapezium are 10 cm and 20 cm.
4.∴ Area=d1×d22=7.5×122=45 cm2
5.∴ The correct answer is √3 : 1
6.3:1
Hence, r1:r2=3:1.
7.Calculations: Let, length = 3 × 5 = 15 cm, breadth = 5 cm and, height = 5 cm. Volume of the new cuboid = l × b × h = 15 × 5 × 5 = 375 cm³. ∴ The volume of the cuboid is 375 cm³
8.The perimeter of the semi-circular disc of radius 10.5 cm is 54 cm.
Answers & Comments
Step-by-step explanation:
1. 11cm
2.50cm²
3.The sum of the parallel sides of the trapezium = 180*2/12 = 30 cm. The parallel sides of the trapezium are 10 cm and 20 cm.
4.∴ Area=d1×d22=7.5×122=45 cm2
5.∴ The correct answer is √3 : 1
6.3:1
Hence, r1:r2=3:1.
7.Calculations: Let, length = 3 × 5 = 15 cm, breadth = 5 cm and, height = 5 cm. Volume of the new cuboid = l × b × h = 15 × 5 × 5 = 375 cm³. ∴ The volume of the cuboid is 375 cm³
8.The perimeter of the semi-circular disc of radius 10.5 cm is 54 cm.
9.Solution
answer is attached in photo column
Hence, the edge of the new cube is 12 cm
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