Question

Mary wants to keep her christmas tree in a wooden box covered
with coloured paper. She wants to know how much paper she needs
to buy. The above mentioned box is 80 cm long, 40 cm wide and
20 cm high. And if the paper is 40 cm square sheets then how many
sheets are needed​

Answer 1

Answer:

How need this covered by 80-60=20 cm

Answer 2

Answer:

given length(l), breadth(b), height(h)

so to find how many paper to cover the box fully we need to find surface area(s.a.) of box

formula (lh + lb + bh)

put l,b,h in the formula

(80.20 + 80.40 + 40.20)

(3200 + 800 + 1600)

(5600)cm²

so divide area of square sheet with s.a. of box

5600cm²/40cm² = 140 sheets

ANS = 140 SHEETS

it was my first try I m new at this app