Question

5. Two and a half litres of paint is used to cover 725 sq m of area.
(1) How much will be required to paint 2001 sq m of area?
(ii) How much area in sq m can be covered by 4.75 litres of paint ?
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Answer 1

ANSWER

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Using Proportionality Method,

725 m^2 ------------> 2.5

2001 m^2 ----------> x

725 : 2.5 :: 2001 : x

PRODUCT OF MEANS = PRODUCT OF EXTREMES

2.5 × 2001 = 725x

2.5 × 2001 / 725 = x

=> x = 6.9 L

ANSWER (I) 6.9 L

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(ii) USING PROPORTIONALITY METHOD,

725 : 2.5 :: x : 4.75

PRODUCT OF MEANS = PRODUCT OF EXTREMES

2.5x = 725 × 4.75

x = 725 × 4.75 / 2.5

=> x = 1377.5 m^2

ANSWER (ii) = 1377.5 m^2

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HOPE IT HELPS :):):):):)