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
= 480 - 100
= 380 g
Mass of T and U
= 470 - 100
= 370 g
Mass of U and V
= 490 - 100
= 390 g
(T + V) + (T + U) + (U + V) = 380 + 370 + 390
2 T + 2 U + 2 V = 1140
2 x (T + U + V) = 1140
T + U + V
= 1140 ÷ 2
= 570 g
Average mass of the objects T, U and V
= 570 ÷ 3
= 190 g
Answer(s): (a) 100 g; (b) 190 g