Helpfulness Meaning in Bengali

What is the meaning of word Helpfulness in Bengali/Bangla ?

Defenition of word Helpfulness

• the property of providing useful assistance
• friendliness evidence by a kindly and helpful disposition

Example

I have been impressed by the knowledge and helpfulness of the staff

Other Meaning of Helpfulness

• NOUN

  উপকারিতা benefit helpfulness good avail percentage use
  কাজেরতা usefulness helpfulness