Question

(i) $20$% of the total quantity of oil is $40$ litres.
Find the total quantity of oil in litres.
(ii) $25$% of a journey covers $5,000km$. How long is the whole journey?
(iii) $3.5$% of an amount is $54.25$. Find the amount.
(iv) $60$% of the total time is $30$ minutes. Find the total time.
(v) $4$% sales tax on the sale of an article is $2$. What is the amount of sale?

Answer 1

$\left(1\right)$ Let the quantity of oil be $x$

$20\%\times x=40⟹x=200$

Hence, the total quantity of oil$=20l$

$\left(2\right)$ $25\%\times x=5000⟹x=20,000$

Hence, length of the whole journey is $20,000km$

$\left(3\right)$ $3.5\%\times x=54.25⟹x=1550$

Hence,the amount is $1,550$

$\left(4\right)$ $4\%\times x=Rs.2⟹x=Rs.50$

Hence,the amount of sale is $Rs.50$