Asked by yuh yuh
Find the lateral area and surface area of the given prism. Round your answer to the nearest whole number.
15 in 17 in 18 in
15 in 17 in 18 in
Answers
Answered by
oobleck
the prism has three pairs of parallel rectangular faces, right? So the area is
2(15*17 + 15*18 _ 17*18) = _____ in^2
2(15*17 + 15*18 _ 17*18) = _____ in^2
Answered by
This8thGradeGirl0_0
1. Multiple: 15 * 17 = 255
2. Multiple: 15 * 18/17= 15 · 18/1 · 17 = 270/17
3. Then multiply the result of step 2 * 18 = 270/17 * 18 = 270 · 18/17 · 1
= 4860/17
4. Add: the result of step No. 1 + the result of step No. 3 = 255 + 4860/17
= 255/1+ 4860/17 = 255 · 17/1 · 17 + 4860/17 = 4335/17 + 4860/17
= 4335 + 4860/17 = 9195/17
5.Multiple: 2 * the result of step No. 4 = 2 * 9195/17 = 2 · 9195/1 · 17
= 18390/17
Is this how to get the answer or no @oobleck?
2. Multiple: 15 * 18/17= 15 · 18/1 · 17 = 270/17
3. Then multiply the result of step 2 * 18 = 270/17 * 18 = 270 · 18/17 · 1
= 4860/17
4. Add: the result of step No. 1 + the result of step No. 3 = 255 + 4860/17
= 255/1+ 4860/17 = 255 · 17/1 · 17 + 4860/17 = 4335/17 + 4860/17
= 4335 + 4860/17 = 9195/17
5.Multiple: 2 * the result of step No. 4 = 2 * 9195/17 = 2 · 9195/1 · 17
= 18390/17
Is this how to get the answer or no @oobleck?
Answered by
oobleck
oops - my typo
2(15*17 + 15*18 + 17*18)
= 2(255+270+306)
= 2(831)
= 1662
whatever made you think you had to do a division? It was clearly the sum of three rectangles ...
2(15*17 + 15*18 + 17*18)
= 2(255+270+306)
= 2(831)
= 1662
whatever made you think you had to do a division? It was clearly the sum of three rectangles ...
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