J and K are two rectangular containers. The base area of J is 79 cm
2 while that of K is 42 cm
2 . At first, J contained water to a height of 41 cm and K was empty, as shown.
- What was the volume of the water in J at first?
- Julian then poured some water from J to K. After that, the height of the water level in J was twice that in K. What was the new height of the water level in J?
(a)
Volume of water in J
= 79 x 41
= 3239 cm
3 (b)
Total base areas
= 79 + 79 + 42
= 200 cm
2 Height of water if the total base area is 200 cm
2 = 3239 ÷ 200
= 16.195 cm
New height of the water level in J
= 16.195 x 2
= 32.39 cm
Answer(s): (a) 3239 cm
3; (b) 32.39 cm