Question

a varies directly as b cube . When a is equal 2 , b is equal to 1, find the value of a ,when b is equal to 3

Answer 1

Step-by-step explanation:

According to question let, A=K

C

3

B

where K is a constant and A=3,B=256,C=2 satisfies the equation, So

3=K

2

3

256

=K

8

16

=2K

K=

2

3

So

A=

2C

3

3

B

Now for A=24,C=

2

1

we have,

24=

2.

2

1

.

2

1

.

2

1

3

B

B

=

3

24.2.

2

1

.

2

1

.

2

1

=

24

48

=2

B=2

2

=4