G and H are two rectangular containers. The base area of G is 70 cm
2 while that of H is 40 cm
2 . At first, G contained water to a height of 40 cm and H was empty, as shown.
- What was the volume of the water in G at first?
- Bryan then poured some water from G to H. After that, the height of the water level in G was thrice that in H. What was the new height of the water level in G?
(a)
Volume of water in G
= 70 x 40
= 2800 cm
3 (b)
Total base areas
= 70 x 3 + 40
= 250 cm
2 Height of water if the total base area is 250 cm
2 = 2800 ÷ 250
= 11.2 cm
New height of the water level in G
= 11.2 x 3
= 33.6 cm
Answer(s): (a) 2800 cm
3; (b) 33.6 cm