D and E are two rectangular tanks. The base area of D is 84 cm
2 while that of E is 42 cm
2 . At first, D contained water to a height of 44 cm and E was empty, as shown.
- What was the volume of the water in D at first?
- Cody then poured some water from D to E. After that, the height of the water level in D was twice that in E. What was the new height of the water level in D?
(a)
Volume of water in D
= 84 x 44
= 3696 cm
3 (b)
Total base areas
= 84 + 84 + 42
= 210 cm
2 Height of water if the total base area is 210 cm
2 = 3696 ÷ 210
= 17.6 cm
New height of the water level in D
= 17.6 x 2
= 35.2 cm
Answer(s): (a) 3696 cm
3; (b) 35.2 cm