7. Average of three numbers is 28. ...
Question
Fullscreen

7. Average of three numbers is 28. If the first number be the half of the second number and the third number be the double of the second number. Find the third number. (1) 12 (2) 24 (3) 36 (4) 48

11th - 12th Class
Maths
Solution
162
Rating
4.0 (1 ratings)
Fullscreen
7. (4) Let the second number be ( x ). Then. first number ( =frac{x}{2} ) and third number ( =2 x ) According to the question, [ frac{frac{x}{2}+x+2 x}{3}=28 ] ( Rightarrow quad frac{x}{2}+3 x=84 ) ( Rightarrow quad frac{7}{2} x=84 Rightarrow x=24 ) Thus, third number ( =2 x=2 times 24=48 )
Quick and Stepwise Solutions Just click and Send Download App OVER 20 LAKH QUESTIONS ANSWERED Download App for Free