Question

sum of the heights of A and B is 320cm and the difference of heights of A and B is 20 cm. the height of B can be. (140 cm /145 /150 cm)​

Answer 1

Step-by-step explanation:

sum of heights A and B is 320

A+B=320

difference of heights A and B

A-B=20

Adding both the equations

2A= 320+20

2A=350

A=350÷2

A=175 .

we know that A+B=320

B=320-175

B=145

Height of B can be 145cm

Answer 2

Answer:

let, the height be x

A = x + 20

B = x

so, then

A + B = 320

x + x + 20 = 320

2x + 20 = 320

20 + x = 160

x = 160 - 20

x = 140

B = 140

A = 140 +20

= 160