At the P.E. class, pupils help each other measure heights. The average height of Peiling and Devi is 120 cm. Peiling is 24 cm taller than Devi. What is the height of Peiling?
Answer:
average (120) = total height of peiling and devi /2
total height of devi = 240
let x = height of devi
x + 24 = height of peiling
since the average of their height is 120 we can say that the total of the heigt of the two is 240
x + x + 24 = 240
2x + 24 = 240
2x = 216
x = 108 cm
HEIGHT OF DEVI = 108 cm
HEIGHT OF PEILING = 132 cm
- Checking:
average = total height of Peiling and Devi / 2
120 = (108 + 132) / 2
120 = 240 / 2
120 = 120
Therefore, the answer is correct and proven.
Step-by-step explanation: