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Question

A rocket of initial mass 3000 kg is burning fuel at the rate of 30 kg/s. Find the mass of the rocket after 10 s.

A
2700 kg
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B
3300 kg
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C
2000 kg
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D
0 kg
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Solution

The correct option is A 2700 kg
Given, initial mass (m0)=3000 kg
Rate of fuel burnt (μ)=30 kg/s
Then, mass at the end of 10 s,
m=m0μt
=300030×10
=2700 kg

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