Discussion

The 3D solid given below has edges of equal length of 16 cm. A rectangular hole of dimensions 4x3 cm and depth 2 cm is made in the centre of each face. Calculate the total surface area of the resulting solid in square cm.

2 months ago

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4 answers.
vinit shimpi

2736


Most Popular Answer a month ago

Amogh Wadhonkar

2777

This is an icosahedron which has 20 faces.

To calculate the surface area just calculate the surface area for one face then multiply it by 20.

Surface area of one face is (area of triangle+area of the sides of the rectangular hole)

which is=> 110.84cmsq (triangle)+ 28cmsq (area of sides of the hole)= 138.84cmsq

Multiplying it by 20= 2776.8

Approximately 2777


12 days ago

Madhura Regundwar

This is an icosahedron which has 20 faces.

To calculate the surface area just calculate the surface area for one face then multiply it by 20.

Surface area of one face is (area of triangle+area of the sides of the rectangular hole)

which is=> 110.84cmsq (triangle)+ 28cmsq (area of sides of the hole)= 138.84cmsq

Multiplying it by 20= 2776.8

Approximately 2777


10 days ago

SAPTARSHI DEBNATH

2245.02

Answer


3 days ago