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 = 180 g
(b)
Mass of T and V
= 470 - 180
= 290 g
Mass of T and U
= 540 - 180
= 360 g
Mass of U and V
= 490 - 180
= 310 g
(T + V) + (T + U) + (U + V) = 290 + 360 + 310
2 T + 2 U + 2 V = 960
2 x (T + U + V) = 960
T + U + V
= 960 ÷ 2
= 480 g
Average mass of the objects T, U and V
= 480 ÷ 3
= 160 g
Answer(s): (a) 180 g; (b) 160 g