C and D are two rectangular tanks. The base area of C is 79 cm
2 while that of D is 42 cm
2 . At first, C contained water to a height of 39 cm and D was empty, as shown.
- What was the volume of the water in C at first?
- Will then poured some water from C to D. After that, the height of the water level in C was twice that in D. What was the new height of the water level in C?
(a)
Volume of water in C
= 79 x 39
= 3081 cm
3 (b)
Total base areas
= 79 + 79 + 42
= 200 cm
2 Height of water if the total base area is 200 cm
2 = 3081 ÷ 200
= 15.405 cm
New height of the water level in C
= 15.405 x 2
= 30.81 cm
Answer(s): (a) 3081 cm
3; (b) 30.81 cm