PSLEThe graph shows the mass of a glass when empty and when different combinations of objects T, U and V are placed in the glass.
- What is the mass of the empty glass?
- What is the average mass of the objects T, U and V?
(a)
Mass of the empty glass = 130 g
(b)
Mass of T and V
= 410 - 130
= 280 g
Mass of T and U
= 360 - 130
= 230 g
Mass of U and V
= 400 - 130
= 270 g
(T + V) + (T + U) + (U + V) = 280 + 230 + 270
2 T + 2 U + 2 V = 780
2 x (T + U + V) = 780
T + U + V
= 780 ÷ 2
= 390 g
Average mass of the objects T, U and V
= 390 ÷ 3
= 130 g
Answer(s): (a) 130 g; (b) 130 g