.Ram has four full rolls of ribbon and one roll of ribbon is 18 3
4
m long.
a. How many metres of ribbon does he has in total?
b. If he decorates five rectangular display boards each
of dimension 3m and 2m by pasting the ribbon along
their borders, then find the length of the remaining
ribbon?
c. If these four full ribbon rolls are used for decorating
the circular wall pieces each of radius 35 cm, then
how many such circular wall pieces can be
decorated?
Answers
Given : Ram has four full rolls of ribbon and one roll of ribbon is 18 3/4 m long.
To Find : How many metres of ribbon does he has in total
b) he decorates five rectangular display boards each of dimension 3m and 2m by pasting the ribbon along their borders, then find the length of the remaining ribbon?
c) Four full ribbon rolls are used for decorating the circular wall pieces each of radius 35 cm, then how many such circular wall pieces can be decorated?
Solution:
one roll of ribbon is 18 3/4 m long
= 75/4 m long
=> 4 rolls = 4 * 75/4 = 75 m
five rectangular display boards each of dimension 3m and 2m
Ribbon used = 5 * ( 2 * ( 3 + 2)) = 50 m
Ribbon left = 75 - 50 = 25 m
circular wall pieces each of radius 35 cm
circumference = 2π ( radius) = 2 * (22/7) * 35 = 220 cm = 2.2 m
such circular wall pieces can be decorated = 75/2.2
= 34.1
= 34
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Answer:
Given : Ram has four full rolls of ribbon and one roll of ribbon is 18 3/4 m long.
To Find : How many metres of ribbon does he has in total
b) he decorates five rectangular display boards each of dimension 3m and 2m by pasting the ribbon along their borders, then find the length of the remaining ribbon?
c) Four full ribbon rolls are used for decorating the circular wall pieces each of radius 35 cm, then how many such circular wall pieces can be decorated?
Solution:
one roll of ribbon is 18 3/4 m long
= 75/4 m long
=> 4 rolls = 4 * 75/4 = 75 m
five rectangular display boards each of dimension 3m and 2m
Ribbon used = 5 * ( 2 * ( 3 + 2)) = 50 m
Ribbon left = 75 - 50 = 25 m
circular wall pieces each of radius 35 cm
circumference = 2π ( radius) = 2 * (22/7) * 35 = 220 cm = 2.2 m
such circular wall pieces can be decorated = 75/2.2
= 34.1
= 34