9. Shikha wants to cover a gift box whose dimensions are 20 cm, 30 cm, and 8 cm. She has a piece of paper of area 1 m². Will she be able to cover the gift? Explain.
Answers
Answer:
Step-by-step explanation: The total surface area of the box is more than 1000cm, and thus the box cannot be wrapped.
Answer:
Given,
piece of paper = 1 sq. m
= 1×100×100 sq. cm
= 10000 sq. cm
Length(L) of a gift box = 30 cm
Breadth(B) of a gift box = 20 cm
Height(H) of a gift box = 8 cm
By formula,
Total surface area(T.S.A) of a gift box = 2(L×B+B×H+H×L)
= 2(30×20+20×8+8×30) sq. cm
= 2(600+160+240) sq. cm
= 2 × 1000 sq. cm
= 2000 sq. cm
Answer :- Yes, she will be able to cover the gift because she has 10000 sq. cm piece of paper but she needs only 2000 sq. cm paper to cover the gift.