Question

Calculate the ratio of 5m to 20km.
Q12. There are 25 computers, 16 of them are out of order. Find the percentage of computers
are out of order.​

Answer 1

1) 1:4000

2) 64 %

Step-by-step explanation:

1) 5 m : 20 km

= 5 m : 20 × 1000 m

= 1 : 4000

Therefore, the required answer is 1:4000

$2) \: \text{Precentage of out order}=100 × \frac{ \text{out \: order } }{ \text{total}} \\ \\ = 100 \times \frac{16}{25} \\ \\ = 4 \times 16 \\ \\ = 64 \%$

Therefore, the required answer is 64%

Answer 2

$\underline {\sf Question:-}$

$\small\red \bigstar \boxed{ \bf 1)}{\bf Calculate \: the \: ratio \: of \: 5 \: m \: to \: 20 \: km}$

$\underline{ \sf SoluTion:-}$

$\small \sf \: We \: know, \\ \\ \small \purple\bigstar{ \underline {\boxed{ \bf 1m \longrightarrow1000m}}} \pink\bigstar$

$\small \bf \: \boxed{(1)} \: {5m:20km}$

$\small \bf \: \implies{5m:20 \times 1000m}$

$\small \bf \: \implies{5m:20000m}$

$\small \bf \: \implies{ \frac{ \cancel5}{ \cancel{20000}} }$

$\small \bf \: \implies{ \frac{1}{4000} }$

$\small \bf \: \implies{1:4000}$

$\small \sf \: \therefore \: The \: ratio \: is \: 1:4000$

$━━━━━━━ \pink ★ ━━━━━━━$

$\underline {\sf Question:-}$

$\small\red \bigstar \boxed{ \bf 2)}$

There are 25 computers, 16 of them are out of order. Find the percentage of computers are out of order.

$\underline{ \sf \: Solution:- }$

$\small \sf \: We \: know,$

$\small \sf \bigstar{ \frac{No. \: of \: Computers \: that \: are \: out \: of \: order }{Total \: no. \: of \: computers} \times 100} \bigstar$

$\small \bf \implies{} \frac{16}{25} \times 100$

$\small \bf \implies{} 4×16$

$\small \bf \implies{64}$

• The percentage of computers

are out of order is 64%