InterviewSolution
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InterviewSolution
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lose it 22/ 7]20. In a group of 3 girls, one girl forgot to bring her lunch, so other two girls decided to share theirlunch with her lunch box. 1st girl's lunch box is in the shape of a cuboidal box measures 6 cm x 8 em xal shaped having radius 7 cm and height 15 cm. Which box15 em and of 2nd girl's lunch box is cylindrical shaped having radius 7 em and height 15 cm. Which boxhas moresurface area and which box has more volume ? Which value is depicted by girls ? |
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Answer» First girl's lunch box Volume v1 = length*breadth*height= 6*8*15 = 720 cm^3Surface area A1= 2(l*b + b*h + l*h)= 2(6*8 + 8*15 + 6*15)= 2(48 + 120 + 90)= 2(258) = 516 cm^2 Second girl's lunch box Volume v2= pi*r*r*h= 22/7*7*7*15= 22*105 = 2310 cm^2 Surface area A2= 2*pi*r(r + h) = 2*22/7*7(7 + 15)= 44(22)= 968 cm^2 Therefore, second girl's lunch box has more surface area and more volume. |
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