Question

Find the whole quantity, if :
(i) 5% of it is 600
(ii) 40% of it is 500 km
(iii) 8% of it is 40 litres.​

Answer 1

Answer:

Solution:

(I)5% of it is 600

Let the number be x

5% of x =600

5/100 ×x=600

x=600×100/5

=12000

(ii) 40% of x=500km

40/100×x=500km

x=500×100/40

=1250km

(iii)8% of x=40

x=40×100/8

=500litres(Answer)

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Answer 2

Question :

$\Large\color{goldenrod}{★}$ Find the whole quantity if :

$\longrightarrow$ ☇ 5% of it is 600

: $\implies$ let the number be x .

: $\implies$ $\large\frac{5}{100}$ × x = 600

: $\implies$ 5x = 600 × 100

: $\implies$ x = $\large\cancel{\frac{60000}{5}}$

: $\implies$ Whole quantity (x) = 12000

$\:$

$\longrightarrow$ ☇ 40% of it is 500

: $\implies$ let the number be x

: $\implies$ $\large\frac{40}{100}$ × x = 500

: $\implies$ 4x = 500 × 10

: $\implies$ x = $\large\cancel{\frac{5000}{4}}$

: $\implies$ Whole quantity (x) = 1250

$\:$

$\longrightarrow$ ☇ 8% of it is 40

: $\implies$ let the number be x

: $\implies$ $\large\frac{8}{100}$ × x = 40

: $\implies$ 8x = 40 × 100

: $\implies$ $\large\cancel{\frac{4000}{8}}$

: $\implies$ whole quantity (x) = 500

$\:$