B and C are two rectangular tanks. The base area of B is 90 cm
2 while that of C is 30 cm
2 . At first, B contained water to a height of 42 cm and C was empty, as shown.
- What was the volume of the water in B at first?
- Vaidev then poured some water from B to C. After that, the height of the water level in B was twice that in C. What was the new height of the water level in B?
(a)
Volume of water in B
= 90 x 42
= 3780 cm
3 (b)
Total base areas
= 90 + 90 + 30
= 210 cm
2 Height of water if the total base area is 210 cm
2 = 3780 ÷ 210
= 18 cm
New height of the water level in B
= 18 x 2
= 36 cm
Answer(s): (a) 3780 cm
3; (b) 36 cm