Mathematics
The area of cross-section of a hosepipe is 3 cm2. Water flows through it at a speed of 50 cm/sec. How many litres of water flows out of it in one minute?
7 litres
8 litres
9 litres
11 litres
Mensuration
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Answer
Given,
Area of cross-section = 3 cm2.
Speed of water = 50 cm/sec.
1 minute = 60 seconds
Calculating the distance traveled by water in 1 minute,
Distance = Speed × Time
Distance = 50 cm/sec × 60 sec
= 3000 cm.
Calculating the volume of water,
Volume = Area of cross-section × Distance by water in 1 minute
= 3 × 3000
= 9000 cm3.
1000 cm3 = 1 litre
∴ 9000 cm3 = litres
= 9 litres.
Hence, option 3 is the correct option.
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