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1. The approximate value of 九十√70 is 11.51, correct option is 11.51.

   What is an approximation?

   An approximation is anything that is similar, but not exactly equal, to something else.

   Now, the value of 九 is given as 22/7 is 3.142

   To the nearest hundredth, it can be written as 3.14

   The value of +√70 is given as 8.366

   To the nearest hundredth as 8.37

   For the required value of the expression we can write,

   九十√70

   Put the value of 九 = 3.14

   and value of √70 = 8.37

   Putting values in expression we have,

   九十√70 = 3.14 + 8.37

   ⇒九十√70 = 11.51

   Hence,the approximate value of 九十√70 is 11.51.

   So,the correct option is 11.51.

   More about approximation :

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