Question

In a factory, 2000 kg metal is lifted by 12 m in 1 minute by a crane. The minimum horse power of the engine is

• A. 320 bhp
• B. 32 bhp
• C. 5.3 bhp
• D. 6.4 bhp

Answer 1

Answer: (C)

5.3 bhp

$P=\frac{dmgh}{dt}=\frac{2000}{60}\times 9.8\times 12$
$P\left(bhp\right)=\frac{400\times 9.8}{746}=5.3bhp$