Question

A varies directly with b. The value of a = 20 when b = 2.5. find the value of a when b =4

Answer 1

32 is correct answer...

Answer 2

Dear Student,

● Answer -

a = 32 when a = 4

● Explaination -

Given that a is in direct variation with b.

a ∝ b

a = kb

For a = 20, b = 2.5.

20 = k × 2.5

k = 20 / 2.5

k = 8

When b = 4,

a = k × b

a = 8 × 4

a = 32

Hence , a is 32 when b is 4.

Hope this helps you. Best luck dear...