JEE MAIN - Mathematics Hindi (2021 - 25th July Evening Shift - No. 11)

यदि $$\left| {\overrightarrow a } \right| = 2,\left| {\overrightarrow b } \right| = 5$$ और $$\left| {\overrightarrow a \times \overrightarrow b } \right|$$ = 8 है, तो $$\left| {\overrightarrow a .\,\overrightarrow b } \right|$$ का मान बराबर है :
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