Water is moving with a speed of 5.18 ms-1 through a pipe with a cross-sectional area of 4.20 cm2 . The water gradually descends 9.66 m as the pipe increase in area to 7.60 cm2 . The speed of flow at the lower level is

Question

Water is moving with a speed of 5.18 ms-1 through a pipe with a cross-sectional area of 4.20 cm2 . The water gradually descends 9.66 m as the pipe increase in area to 7.60 cm2 . The speed of flow at the lower level is (A) 3.0 ms-1  (B) 5.7 ms-1  (C) 3.82 ms-1  (D) 2.86 ms-1

Tardigrade Admin · Accepted Answer

a1v1=a2v2 ⇒ 4.20× 5.18=7.60× v2 ⇒ v2=2.86 m/s

Q. Water is moving with a speed of 5.18 $m s^{- 1}$ through a pipe with a cross-sectional area of 4.20 $c m^{2}$ . The water gradually descends 9.66 m as the pipe increase in area to 7.60 $c m^{2}$ . The speed of flow at the lower level is

3.0 $m s^{- 1}$

5.7 $m s^{- 1}$

3.82 $m s^{- 1}$

2.86 $m s^{- 1}$

$a_{1} v_{1} = a_{2} v_{2}$
$\Rightarrow$ $4.20 \times 5.18 = 7.60 \times v_{2}$
$\Rightarrow$ $v_{2} = 2.86 m / s$

Q. Water is moving with a speed of 5.18 ms−1 through a pipe with a cross-sectional area of 4.20 cm2 . The water gradually descends 9.66 m as the pipe increase in area to 7.60 cm2 . The speed of flow at the lower level is

3.0 ms−1

5.7 ms−1

3.82 ms−1

2.86 ms−1