Question

1:A customer has requested a bookcase

with the two shelves having a total
area of 864 square inches. What
should b equal to meet the customer's
specifications?


2: Barnard has a stain on his wall and would like to cover it up with a bookcase. What should b equal in order for the back of the bookcase to cover an area of 4800 square inches

Answer 1

1. 8.5 inches

2. 20 inches

Explanation:

1. Total area of the shelve = (4b x 3b)

864 = 12

= 12

=

= 72

b =

= 8.486 inches

b = 8.5 inches

2. Bernard wish to cover an area of 4800 square inches.

Then,

Area = length x width

4800 = 4b x 3b

= 12

=

= 400

b =

= 20 inches

The value of b should be 20 inches.