Question

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chp. 13 surface area and volume​

Answer 1

no. of bricks tht can be painted by the container

=Area tht can be painted by the container/surface area of brick

Area tht can be painted by the container = 9.375msquare ×10000cmsquare

=93750 cm square

TSA of cuboid = 2(lb +bh +hl)

Tsa of 1 brick =2( 22.5 ×10+10×7.5+7.5×22.5)

=937.5 cm square

no. of bricks tht can be painted out of the container

=area tht can be painted by the container/area of 1 brick

=93750/937.5

937500/9375

=100

100 bricks can be painted

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