AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

A hemispherical tank, full of water, is emptied by a pipe at the rate of $25 / 7$ litres per second. How much time will it take to empty half the tank if the diameter of the base of the tank is 3 m?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

16.5 \min

11.5 \min

26.5 \min

16.6 \min

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Given,
Rate=25/7 liters per second
Diameter= 3 m
Calculate the volume of hemispherical tank

V = \frac{2}{3} π r^{3}

\begin{matrix} = \frac{2}{3} \times \frac{22}{7} \times {(\frac{3}{2})}^{2} \\ = \frac{99}{14} m^{3} \\ = \frac{99}{14} \times 1000 litres \\ = \frac{99000}{14} litres \end{matrix}

So, volume of water to be emptied

= \frac{1}{2} \times

Volume of tank

= \frac{1}{2} \times \frac{99000}{14}

= \frac{99000}{28} litres

Now Rate=25/7 liters per second
Thus,

\frac{25}{7} litres = 1 \sec

For one liter time taken,
1 litres

= \frac{7}{25} \sec

Time taken for

\frac{99000}{8} litres

= \frac{7}{25} \times \frac{99000}{28} \sec

= \frac{693000}{700}

= 990 \sec

= \frac{990}{60} \min

= 16.5 \min

Option 1 is correct.

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!