Question

Find the whole quantity if

1. 5% of it is 600.
2. 12% of it is Rs 1080.
3. 40% of it is 500 km.
4. 70% of it is 14 minutes.
5. (e) 8% of it is 40 litres

Answer 1

(a) $5\%$ of $x$ = $600$

$\frac{500}{100}\times x= 600$

$x=600\times\frac{100}{5}$

= $12000$

---

(b) $12\%$ of $x$ = Rs $1080$

$\frac{12}{100}\times x= Rs\;1080$

$x= RS \;1080\times\frac{100}{12}$

= $Rs\;9000$

---

(c) $40\%$ of $x$ = $500$ km

$\frac{40}{100}\times x=500\;km$

$x=500\times\frac{100}{40}=1250\;km$

---

(d) $70\%$ of $x$ = $14$ min

$x\times \frac{70}{100}=14\min$

$x=14\times\frac{100}{70}=20\;min$

---

(e) $8\%$ of $x$ = $40$ L

$x\times\frac{8}{100}=40 \;L$

$x=40\times \frac{100}{8}$

= $500\;L$