Question

A roll of paper 35 cm by 22 cm was cut and
25 cubes with edge 2 cm were made from it.
Find the area of the paper left.
​

Answer 1

roll of the paper = volume of cube

35 * 22 = 50

solve equation

Answer 2

Answer:

Area of roll of paper

=

35

×

22

c

m

2

=

770

c

m

2

Surface area of 1 cube with side

a

=

6

a

2

Surface area of 25 cubes with side 2 cm

=

25

×

6

×

4

=

600

c

m

2

Area of paper left

=

770

−

600

=

170

c

m

2