Biswas made a box 20 cm long., 15 cm broad and 10 cm high but without

1.	Biswas made a box 20 cm long., 15 cm broad and 10 cm high but without a lid. How much cardboard did he use for it?
Answer» SOLUTION :- LENGTH of the box=20 cm Breadth of the box=15 cm Height of the box=10 cm Total SURFACE area=2(lb+bh+lh) =2(20×15+15×10+10×20) =2(300+150+200)=2×650=1300sq.cm Area of the lid=length×breadth=20×15=300sq.cm Area of the box WITHOUT lid=1300−300=1000sq.cm Hence proved Thanks

Biswas made a box 20 cm long., 15 cm broad and 10 cm high but without a lid. How much cardboard did he use for it?

Answer»

LENGTH of the box=20 cm

Breadth of the box=15 cm

Height of the box=10 cm

Total SURFACE area=2(lb+bh+lh)

=2(20×15+15×10+10×20)

=2(300+150+200)=2×650=1300sq.cm

Area of the lid=length×breadth=20×15=300sq.cm

Area of the box WITHOUT lid=1300−300=1000sq.cm