Question

Maths hw
The cost of 5 metres of a particular quality of cloth is Rs 210.Tabulate the cost of 2,4,10 and 13 metres of cloth of the same type.
Q2. An electric pole , 14 metres high , casts a shadow of 10 metres.Find the height of a tree that casts a shadow of 15 metres under similar conditions.
Q3. If the weight of 12 sheets of thick paper is 40 grams , how many sheets of the same paper would weigh 2 and half kilograms?
Q4. A train is moving at a uniform speed of 75km /hour.
How far will it travel in 20 minutes?
Find the time required to cover a distance of 250 km.
Q5. A loaded truck travels 14 km in 25 minutes.If the speed remains the same , how far can it travel in 5 hours?

Answer 1

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Here's your Answer...

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1.

5 meters => Rs. 210

13 metre = ?

=> 210 × 13/5

=> 546
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2.

=> AB/PQ = BC/ QR

=> 14/10 = h/15

=> h = 15 × 14 /10

=> h = 21cm.
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3.
weight of one sheet=x

12x=40 g

x=40/12
=3.33 g

total weight=5/2 kg=2.5 kg=2500 g

number of sheets=2500/3.33

=750 full sheets
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4.
Speed of trian = 75 km/hr = 75 km in 60 min

60 min     -   distance covered 75 km
20 min     - distance covered = ?

Distance =20/60×75. = 25km

To cover a distance of 75 km it takes 60 min.

to cover a distance of 250 km, time taken

= 250/75 × 60. = 200 minute.
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5.
Distance = speed *time 

Time = 25mins = 25/60,=5/12hr
Speeds = distance /time 
Speed = 14k/5/12hr
=14*12/5
=168/5
Distance in case 2 = 5*168/5
=168 km
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Answer 2

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