Question

monty take 2 minutes to raise a load of 15kg from the ground to 3rd floor of a building.Pintu takes 1.5 minutes to complete the same job.compare (a)the work done,and (b)powers of monty and pintu ​

Answer 1

mass=15kg,time=2m,gravity=9.8ms^2
F=15*9.8=147
W=Force*speed=147*2=294N
This answer may help you

Answer 2

Answer:

Let the time taken to complete the work by B be x.

A can take x - 6 hours.

A and B together can complete the work = 13 hours 20 minutes.

x−6

1

+

x

1

=13

60

20

x

2

−6x

2x−6

=

40

3

40(2x−6)=3x

2

−18x

80x−240=3x

2

−18x

3x

2

−98x+240

Using quadratic formula,

2a

−b±

b

2

−4ac

2×3

98±

(−98)

2

−4×3×240

6

98±

6724

6

98±82

So, x = 30, x = 2.6666..

x value cannot be negative.

B take 30 hours to complete the work alone.