Question

Pls answer fast with EXPLANATION i will surely mark as brainliast and thanks.​

Answer 1

Answer:

Answer:

Power (P) =2kw =2000w

Power(P) in watts =J/s

1 watts = 1 J/s

Therefore , 2000w = 2000 J/s

One minute = 60 seconds

Power (P) is also given by

P= Work done ( W )/( t ).....( 1 )

w = mgh

Height (h) = 10m

g = 9.8m/s2

Applying all the above data in equation( 1 )

P=(m×9.8×10) / 60

Therefore, m = 1224.489 Kg

Thus , the electric pump can lift 1224.489 Kg , every minute to height of 10 m.

I wish it was helpful for you.

Answer 2

$\large \underline\bold{1. \: QuesTion - }$

$\star$ What should be added to x²+xy+y² to obtain 2x²+3xy ?

$\large \underline\bold{\: AnsWer - }$

We have to subtract the given equations ,

$\: \: \: \: \: \sf \longrightarrow \: (2 {x}^{2} + 3xy) - ( {x}^{2} + xy + {y}^{2} )$

$\: \: \: \: \: \sf \longrightarrow \: 2 {x}^{2} + 3xy - {x}^{2} - xy - {y}^{2}$

$\: \: \: \: \: \sf \longrightarrow \: 2 {x}^{2} - {x}^{2} + 3xy - xy - {y}^{2}$

$\: \: \: \: \: \red{ \boxed{ \sf \longrightarrow \: {x}^{2} + 2xy - {y}^{2} }}$

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$\large \underline\bold{2. \: QuesTion - }$

$\star$ What should be subtracted from 2a+8b+10 to get -3a+7b+16.

$\large \underline\bold{\: AnsWer - }$

Let p is required term ,

$\: \: \: \: \: \longrightarrow\sf(2a+ 8b +10)-p= - 3a + 7b + 16$

$\: \: \: \: \: \longrightarrow\sf \: p = 2a + 8b + 10 - ( - 3a + 7b + 16)$

$\: \: \: \: \: \longrightarrow\sf \: p = 2a + 8b + 10 + 3a - 7b - 16$

$\: \: \: \: \: \longrightarrow\sf \: p = 2a +3ab + 8b - 7b + 10 - 16$

$\: \: \: \: \: \red{ \boxed {\longrightarrow\sf { {p = 5a + b - 6}}}}$