Question

The average height of A B C is 150 cm . If the average height of A and B is 140 cm and that of B and C is 130 cm . Find height of B

Answer 1

short method,

if A+B+C = 150cm

value of A+B = 130

then ,

putting the value,

A+B+C = 150

140 + C = 150

C = 150-140

= 10cm

and, B+C = 130

B + 10 = 130

B. = 130-10 = 120cm