Question

An open tank 10 m long and 2 m deep is filled upto 1.5 m height of oil of specific gravity 0.82. The tank is uniformly accelerated along its length from rest to a speed of 20 m/sec horizontally. The shortest time in which the speed may be attained without spilling any oil is : [g = 10 m/sec²]

• A. 20 sec
• B. 18 sec
• C. 10 sec
• D. 5 sec

Answer 1

Answer: (A)

20 sec

Answer 2

v = u + a_x t, a_x = $\frac{v}{t}$

tan  = $\frac{a_{x}}{g}$ = $\frac{v}{t_{g}}$ = $\frac{0.5}{5}$ (in triangle ABC)

 t = $\frac{10 \times 20}{10}$ = 20 sec.