Q120
Water flows into a tank which is 200 m long and 150 m wide through a pipe of cross-section 0.3 m × 0.2 m at 20 km/hour. Then the time (in hours) for the water level in the tank to reach 8 m is
A.
50
B.
120
C.
150
D.
200
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Let the number of hours be x⇒ (0.3 × 0.2 × 20000) × x = 200 × 150 × 8
⇒ x =
⇒ x = 200 hrs.