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 = 100 g
(b)
Mass of T and V
= 380 - 100
= 280 g
Mass of T and U
= 450 - 100
= 350 g
Mass of U and V
= 430 - 100
= 330 g
(T + V) + (T + U) + (U + V) = 280 + 350 + 330
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) 100 g; (b) 160 g