Arectangle with sides 3 cm and 5 cm was enlarged in the ratio 1: 3

how did the area of the rectangle change?

The area was originally 3*5, or 15 cm^2.

When the sides were enlarged, they were all multiplied by 3. The new sides are 3*3, or 9, and 5*3, or 15.

The new area is 9*15, or 135 cm^2.

If you divide 135, the new area, by 15, the original area, you get 9. So, the area increased by a factor of 9.

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3