Did British Empire and Pakistan exist in the same era?

Yes, the two civilizations both existed around 1947 CE.

Which lasted longer, British Empire or Pakistan?

British Empire lasted longer (414 years).

British Empire: Avrupa; Pakistan: Asya

British Empire (1583 CE – 1997 CE) and Pakistan (1947 CE – present) lived in the same era.

The empire with the most extensive territory in history. It was referred to as "the empire on which the sun never sets."

Islamic Republic of Pakistan · Asia

Did British Empire and Pakistan exist in the same era?: Yes, the two civilizations both existed around 1947 CE.
Which lasted longer, British Empire or Pakistan?: British Empire lasted longer (414 years).
Which regions did British Empire and Pakistan rule?: British Empire: Avrupa; Pakistan: Asya