Question

Please solve..........​

Answer 1

Step-by-step explanation:

Given:-

The diameter of the hemi spherical cup is 1.4d cm

To find:-

How much brass plate will be required to make a cup of diameter of 1.4cm in the form of Hemisphere.

Solution:-

Diameter of the hemi spherical cup=1.4dcm

Radius of the cup

=>Radius=Diameter/2

Radius =1.4/2=0.7 dcm

We know that 1 dcm=10cm

Radius=0.7×10 cm=7cm

Using Concept:-

To make a hemispherical cup from a brass plate=Curved surface area of a hemisphere=2πr² sq.units

=>2×(22/7)×7² cm²

=>(2×22×7×7)/7 cm²

=>2×22×7 cm²

=>44×7 cm²

=>308 cm²

Answer:-

The required brass plate is of 308 cm²

Answer 2

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