Question

20. If a and b varies inversely as each other and a = 16
when b = 4. Find b when a = 32.
(a) 2
(b) 8
(c) 4
(d) None of these​

Answer 1

Answer:

16 × 4 = 32 × B

64 = 32B

64 B

32

2 = B

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Answer 2

Answer - 2

Explanation = a∝1/b

a= k/b

k=ab

Find the value of k, using the a and b given.

k= 16×4= 64

So, a= 64/b can also be written as b=64/a

When a= 32 , b= 64/32 = b= 2