Math, asked by dogless722, 4 months ago

please answer these question

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Answered by himanshusha

1

Answer:

ans 18

=ab-7b+7a-49

ans 20

in 48 hours 15 worker build a wall

in 1 hours 15×48 worker build a wall

in 30 hour (15×48)÷30 worker build a wall

=24 worker ans

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