[Lucky Chauhan]

Total no. Of products that is bought by store = 2000

Price of one product= 10 rs

Then the total cost of all products will be = 2000*10 = 20000

Now-

Store sold 100 products at 15rs –

Then earn = 100*15 = 1500

And

Sold 20 products at 20rs –

Then earn = 20*20 = 400

Total earning = 1500 + 400 = 1900

We know –

loss/profit = total revenue – total cost

Loss/profit = 1900 – 20000= -18100

Mean store are in loss with ( – 18100) rs…

Then

Percentage of loss = ( loss/toal cost)*100

Percentage of loss = (-18100/20000) = -90.5

Then Total percentage of loss will be -90.5

[Lucky Chauhan]

Let the length of rectangle is l and width is w …

Then according to the question ..

l = 2w..

Given..

Perimeter = 36 unit

We know that –

Perimeter = 2( lenth + width)

And l = 2w then..

36 = 2( 2w + w)

3w = 18

W = 6 and

l = 2*6

l= 12

Then lenth of rectangle of will be 12 and width of rectangle will be 6.

[Lucky Chauhan]

Geeta has saved Rs. 300 and Meeta has saved Rs. 450. Together, they have a total of Rs. (300 + 450) = Rs. 750.

They each spend half of their money on a trip to the mall, so Geeta spends Rs. 300/2 = Rs. 150 and Meeta spends Rs. 450/2 = Rs. 225.

After their trip to the mall, Geeta has Rs. 300 – 150 = Rs. 150 left, and Meeta has Rs. 450 – 225 = Rs. 225 left.

If they combine their remaining money, they have Rs. (150 + 225) = Rs. 375.

To buy the Barbie doll, they need Rs. 660 – 375 = Rs. 285 more.