Question

3.68 boxes of a certain commodity require a shelf length of 3.4 metre. How many boxes of the same
commodity would occupy a shelf length of 5.1 metres ?
4. In 10 days, the earth picks up 2.6 X 10 pounds of dust from the atmosphere. How many dust will it pick
up in 45 days?​

Answer 1

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3. Given:

• 68 boxes take shelf length of 3.4 metres

To Find:

• No of boxes that take shelf length of 5.1 metres

Solution:

$\implies 3.4 metres \longrightarrow 68 boxes \\ \implies 1 metre \longrightarrow \dfrac{68\!\!\!\!/^{\:\:20}}{3.4\!\!\!\!/_{\:\:1}} boxes \\ \implies 5.1 metres \longrightarrow 20 \times 5.1 \\ \bold{\implies 5.1 metres \longrightarrow 102 boxes }$

4. Given:

• 2.6 X 10(=26) pounds of dust picked in 10 days

To Find:

• Dust picked in 45 days

Solution:

$\implies 10 days \longrightarrow 26 pounds \\ \implies 1 day \longrightarrow \dfrac{26\!\!\!\!/^{\:\:2.6}}{10\!\!\!\!/_{\:\:1}} pounds \\ \implies 45 days \longrightarrow 2.6 \times 45 pounds \\ \bold{\implies 45 days \longrightarrow 117 pounds\:of\: dust }$

Hope it helps!