How many lakhs make five billion?
$$\textbf{Convert billions to Lakhs}$$
$$1$$ billion $$= 1, 000, 000, 000$$
$$\therefore$$ $$5$$ billions $$= 5 \times 1, 000, 000, 000$$
$$= 5, 000, 000, 000$$
$$= 5000000000$$
$$= 50000 \times 100000$$
$$= 50000$$ Lakhs (since $$100000 = 1$$ lakh)
$$\textbf{Hence, 50, 000 Lakhs make the five billions}$$.