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 = 110 g
(b)
Mass of T and V
= 500 - 110
= 390 g
Mass of T and U
= 420 - 110
= 310 g
Mass of U and V
= 430 - 110
= 320 g
(T + V) + (T + U) + (U + V) = 390 + 310 + 320
2 T + 2 U + 2 V = 1020
2 x (T + U + V) = 1020
T + U + V
= 1020 ÷ 2
= 510 g
Average mass of the objects T, U and V
= 510 ÷ 3
= 170 g
Answer(s): (a) 110 g; (b) 170 g