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krek1111 [17]
3 years ago
9

The surface area of two hemispheres are in the ratio 64: 121. Find the ratio of their radii

Mathematics
2 answers:
Blababa [14]3 years ago
8 0

Answer:

5:7

Step-by-step explanation:

Let the radius of first hemisphere be 'r' units

Let the radius of second hemisphere be 'R' units

2 x \piπ x r^2 / 2 x \piπ x R^2 = 25 / 49

r^2 / R^2 = 25 / 49

r / R = 5 / 7

the ratio of radii is 5:7.

mestny [16]3 years ago
6 0

answer:

R : 8 , R: 11

explaination:

CSA OF HEMISPHERE IS  ; 2\pir2

CSA  of 1st hemisphere is in ratio of 2nd one

2\pir2:2\pir2

then 2 and pi will be cancelled rest is  '' r ''square.

then find the squares of their 64 and 121

which 64= 8

121= 11

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Answer:

Required probability is 0.3025.

Step-by-step explanation:

Given that probability of landing heads up in a toss of bent coin = 0.55

Then probability of getting head in 1st toss = 0.55

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3 years ago
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4 years ago
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3 years ago
Use the following statements to find a compound statement for (p∨q)∧rp∨q)∧r p: 5<-3 q: All vertical angles are congruent. r:
guajiro [1.7K]
Given the compound statement <span>(p∨q)∧r
where: p: 5 < -3
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Therefore, the compound statement <span>(p∨q)∧r can be written as follows:
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4 0
4 years ago
Rationalise the denominator <br>​
Margaret [11]

Step-by-step explanation:

1. \frac{2 \sqrt{3} }{ \sqrt{5} }

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8 0
3 years ago
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