Question

a+b=20,a-b=10,a/b=3 then a*b=?

Answer 1

a+b=20

a-b=10

- + -

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2b=10

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b=10

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2

b=5

a+5=20

a=20-5

a=15

a*b=5×15

=75

Answer 2

Answer:

as given in the question it salf a*b =20

Step-by-step explanation:

so,a/1+1/b=10/20

1/a+1/b=1/2