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 = 150 g
(b)
Mass of T and V
= 460 - 150
= 310 g
Mass of T and U
= 400 - 150
= 250 g
Mass of U and V
= 490 - 150
= 340 g
(T + V) + (T + U) + (U + V) = 310 + 250 + 340
2 T + 2 U + 2 V = 900
2 x (T + U + V) = 900
T + U + V
= 900 ÷ 2
= 450 g
Average mass of the objects T, U and V
= 450 ÷ 3
= 150 g
Answer(s): (a) 150 g; (b) 150 g