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Error message

  • Deprecated function: Return type of DatabaseStatementBase::execute($args = [], $options = []) should either be compatible with PDOStatement::execute(?array $params = null): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2244 of /home/eduvai/public_html/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /home/eduvai/public_html/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /home/eduvai/public_html/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /home/eduvai/public_html/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /home/eduvai/public_html/includes/database/database.inc).
  • Deprecated function: Return type of DatabaseStatementEmpty::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 2346 of /home/eduvai/public_html/includes/database/database.inc).
Question: 
এক ব্যক্তি স্রোতের অনুকূলে নৌকা বেঁয়ে ঘণ্টায় ১০ কিঃমিঃ বেগে চলে কোন স্থানে গেল এবং ঘণ্টায় ৬ কিঃমিঃ বেগে স্রোতের প্রতিকূলে চলে যাত্রারম্ভের স্থানে ফিরে এল,যাতায়াতে তার গড় গতিবেগ ঘণ্টায় কতো কিঃমিঃ ?
Answer: 
৭.৫
৭.৫
৫.৫
৬.৫
৮.৫
Last Updated: 
17/01/2021 - 19:41

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