Question

A rocket in gravity free space is burning 500 kg of fuel per second. The exhaust gases are expelled at 8000 m/s relative to the rocket whose mass is 4 x 10 kg at that time. Its acceleration will be (A) 10 ms ^-2 (B) 50 ms ^-2 (C) 2.5 X 10^4 ms^-2 (D) 20 ms^-2​

Answer 1

Answer:

P=Rs.1200,A=Rs.1632,t=4

A=P+

100

P×r×t

⟹1632=1200

100

1200×r×4

⟹r=9%

Now if rate is increased by 1% then r=(9+1)%=10%then amount will be,

A=P+

100

P×r×t

⟹A=1200

100

1200×10×4

⟹A=Rs.1680

Answer 2

Answer:

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