Question

plz say me fast and say me correctly ​

Answer 1

Step-by-step explanation:

$\huge \sf\fbox \blue{Required \: Solution} : : -$

No 1.

1 hour = 60min

2 hours = 60 × 2

=>120

$= > \dfrac{ \cancel \red{36}}{\cancel \red{120}} \\ = > \huge\fbox \green{ 3 : 10}$

No 2.

If 16 : x : : 18 : 72

Find value of x =?

16:x : : 18 : 72

We know,

If a, b, c & d are in proportion

a : b : : c : d

Thus, a × d = b × c

• a = 16
• b = x
• c = 18
• d = 72

Equation :

$:\implies \: x × 18 = 16 × 72 </p><p> \\ :\implies \: x = \frac{16 \times \cancel \red{72}}{\cancel \red{18} } \\ \huge:\implies \sf \fbox\purple{64}$

No 3.

We know :

1 km = 1000m

3 km = 3000

$:\implies 3000 + 200 = 1640 \\ :\implies 3200 = 1640 \\ :\implies \dfrac{\cancel \blue{1640}}{ \cancel \blue{3200} }\\ :\implies \: \frac{41}{80} \\ \huge:\implies \fbox \red{ 80 : 41 }$

No 4.

Cost of 60 pens = ₹540

$\sf \: Thus, \: Cost \: of \: 1 \: pen = \dfrac{ \cancel{540}}{ \cancel{60}} \\ = > \fbox\red 9$

$\sf9 × 9 = \red{ 81 }</p><p> \\ \therefore \sf \pink{ Cost \: of \: 9 \: pens = \huge \green{₹81}}$

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Hope it helpful..✌️

@Somya2563

Answer 2

Answer:

1.

Ratio of 35,min to 2 hours= 35:120

=7:24

2.

We know that,

If a, b, c and d are in proportion.

a : b : : c : d

∴ a × d = b × c

Here, a = 16, b = x, c = 18 and d = 72

∴ x × 18 = 16 × 72/18

⇒ x = 16 × 72

⇒ x = 16 × 4

⇒ x = 64

Thus, the value of "x is equal to 64".

3.

3000m + 200m = 1640m

3200m : 1640m

320m : 164m

80 : 41

4.

The cost of 60 pens =Rs.540

So,

The cost of 1 pen = Rs.540/60

= Rs.9

Therefore, cost of 9 pens = 9×9

= Rs.81

5.

In Vermans shop onions are more expensive.