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

Answer 2

P = $\frac{dmgh}{dt} = \frac{2000}{60} \times 9.8 \times 12$P(bhp)

= $\frac{400 \times 9.8}{746} = 5.3bhp$