What is the square root of 0.09 ?

The weight of a bucket full of water is 36 kg. If the weight of a half-filled bucket is 21 kg, what will be the weight of the empty bucket?

Direction : What should come in place of the question (?) in the following question.

(?)² + (65)²=(160)² -  (90)² – 7191

Direction : What should come in place of the question (?) in the following question.

140% of 450 + 24% of 650 =?

Direction: what should come in place at question mark(?).

(0.85% of 405) +(2.25% of 550)=?

If 0.5x + 0.7y=0.5 and 0.7x + 0.5y=0.7,then the value of x+y is

23+ 3+33+333+3.33=?

What approximate value should come in the place of question mark (?) in the following question?
 (8423 + 3120 + 6543) ÷ (1536 + 377 + 189) = ?