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2 years ago

15

A concave mirror of radius of 30cm produces and image three times in size of the object the distance of the object from the mirr

or is?

1 answer:

Sloan [31]2 years ago

4 0

$\\ \sf\longmapsto m=\dfrac{-v}{u}$

v is image distance and u is object distance.

$\\ \sf\longmapsto 3=\dfrac{-v}{30}$

$\\ \sf\longmapsto -v=30(3)$

$\\ \sf\longmapsto v=-90cm$

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If 4,800 cm2 of material is available to make a box with a square base and an open top, find the largest possible volume of the

Sloan [31]

Answer:

32000cm^3

Explanation:

Length L be base length

h be the height

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V=L^2h

Surface area if box= L^2+4lh=4800

Solving for h

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1200L-L^3/4=h

Substitute for h in V =L^2h

v=1200L-L^3/4

Differenting =1200-3*L^2/4=0

L=√(1600)=40

Substitute L=40

In V=1200L-L^3/4

Hence 1200*40-40^4/4=32000cm^3

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3 years ago

Read 2 more answers

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sergejj [24]

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3 years ago

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Lady bird [3.3K]

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3 years ago

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Vaselesa [24]

Answer:

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