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defon
3 years ago
13

The side of a square is 10 cm. What is the increase in area in percentage if the side is lengthened by 3 cm.

Mathematics
1 answer:
kirill115 [55]3 years ago
4 0

Answer: 69%

Step-by-step explanation:

10 cm

Find the area. A=s^2

A=(10cm)^2\\A=100cm^2

Now calculate the area when a side is lengthened by 3 cm.

10+3=13 cm

A=s^2\\A=(13cm)^2\\A=169cm^2

Now calculate the difference.

169-100=69

Divide it by the original number (100) and multiply by 100

\frac{69}{100}*100=69

This is the increase.

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