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 = 170 g
(b)
Mass of T and V
= 450 - 170
= 280 g
Mass of T and U
= 460 - 170
= 290 g
Mass of U and V
= 440 - 170
= 270 g
(T + V) + (T + U) + (U + V) = 280 + 290 + 270
2 T + 2 U + 2 V = 840
2 x (T + U + V) = 840
T + U + V
= 840 ÷ 2
= 420 g
Average mass of the objects T, U and V
= 420 ÷ 3
= 140 g
Answer(s): (a) 170 g; (b) 140 g