Question

please again help me please​

Answer 1

Answer:

Given , Mass of object, m=10 kg

Velocity of object, v=20ms

−1

Initial Kinetic energy, K

1

=

2

1

×10×20

2

=2000 J

Now, Final mass, m

2

=20 kg

Final Velocity, v

2

=10m/s

Final Kinetic energy, K

2

=

2

1

×20×10

2

=1000 J

Required Ratio =

K

2

K

1

=

1000

2000

=2:1

Answer 2

Answer:

Step-by-step explanation:

Cost of per dozen oranges = Rs 156

As we know, One dozen oranges = 12 oranges

So, Cost of 1 oranges = Rs ( 156/12 )

= Rs 13

So, The cost of 100 oranges = Rs 13 x 100

= Rs 1300

Cost of 1 dozen bananas = Rs 72

As we know, One dozen bananas = 12 bananas

So, Cost of 1 banana = Rs ( 72/12 )

= Rs 6

So, the cost of 100 bananas = Rs (100 x 6)

= Rs 600