Question

$0.3 \sqrt{1.21} \times \sqrt{400}$
​

Answer 1

$0,3\sqrt{1,21}*\sqrt{400}=0,3*\sqrt{1,1^{2} }*\sqrt{20^{2} }=0,3*1,1*20=\boxed{6,6}$

Answer 2

Ответ:

В объяснении.

Объяснение:

$0.3 \sqrt{1.21} \times \sqrt{400} = \frac{3}{10} \times \sqrt{ \frac{121}{100} } \times 20 = 3 \times \frac{11}{10} \times 2 = 3 \times \frac{11}{5} = \frac{33}{5} = 6 \frac{3}{5} = 6.6$