Question

(Image) Q. 24
Please explain also

Answer 1

Answer:

₹2200

Step-by-step explanation:

Given,

5 cubes are fused together by placing it side by side.

That means each 1 side of the cube is against each other and thus cannot be painted.

No of sides of cube that cannot be painted

= 5

TSA of 1 cube

= 6 x a x a cm sq

TSA of 5 cubes

= 5 x 6 x a x a cmsq

= 30 x 2 x 2 cmsq

= 120 cmsq

Area of the sides that cannot be painted

= 5a cmsq

= 5 x 2 cmsq

= 10 cmsq

Area of cube that can be painted

= (120 - 10)cmsq

= 110cmsq

Cost of painting

= ₹(110 x 20)

= ₹2200