Question

$\sqrt{4.8\times {10}^9}$ is closest in value to

• A. $2200$
• B. $70000$
• C. $220000$
• D. $7000000$
• E. $22000000$

Answer 1

Answer: (B)

$70000$

$\sqrt{4.8\times {10}^9}$

$=\sqrt{48\times {10}^8}$$\simeq$$7\times {10}^4=70000$

$7^2$$=$$49$

Hence Option B is correct.