If the thickness of a pile of 12 cardboard sheets is 45 mm, then the thickness of a pile of 240 sheets is _______ cm.
Solution:
Thickness of the pile of 12 cardboard sheets = 45 mm
Thickness of one sheet = 45/12 mm = 3.75 mm or 3 3/4 mm
Thickness of a pile of 240 sheets = 240 × 3 3/4 = 240 × 15/4 = 900 mm or 90 cm
(We use the direct proportionality method or the unitary method to find the solution.)
✦ Try This: If the thickness of a pile of 24 cardboard sheets is 90 mm, then the thickness of a pile of 300 sheets is _______ cm.
Thickness of the pile of 24 cardboard sheets = 90 mm
Thickness of one sheet = 90/24 mm = 3.75 mm or 3 ¾ mm
Thickness of a pile of 300 sheets = 300 × 3 ¾ = 300 × 15/4 = 1125 mm or 112.5 cm
If the thickness of a pile of 24 cardboard sheets is 90 mm, then the thickness of a pile of
300 sheets is 112.5 cm.
☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 13
NCERT Exemplar Class 8 Maths Chapter 10 Problem 36
If the thickness of a pile of 12 cardboard sheets is 45 mm, then the thickness of a pile of 240 sheets is _______ cm.
Summary:
If the thickness of a pile of 12 cardboard sheets is 45 mm, then the thickness of a pile of 240 sheets is 90 cm.
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