PSLEThe graph shows the mass of a glass when empty and when different combinations of objects V, W and X are placed in the glass.
- What is the mass of the empty glass?
- What is the average mass of the objects V, W and X?
(a)
Mass of the empty glass = 100 g
(b)
Mass of V and X
= 390 - 100
= 290 g
Mass of V and W
= 340 - 100
= 240 g
Mass of W and X
= 410 - 100
= 310 g
(V + X) + (V + W) + (W + X) = 290 + 240 + 310
2 V + 2 W + 2 X = 840
2 x (V + W + X) = 840
V + W + X
= 840 ÷ 2
= 420 g
Average mass of the objects V, W and X
= 420 ÷ 3
= 140 g
Answer(s): (a) 100 g; (b) 140 g