Explanation

Australia was discovered for the first time in 1770, by James Cooke. He landed near the Sydney harbour.

Explanation

Salt is spread on icy roads in winter to lower the freezing point of water, causing ice to melt.

This makes roads safer by preventing the formation of thick ice.

Explanation

10men×6hours×18days1work=15men×12days×H hour/day1work⇔6 hours

Explanation

This relationship is called Boyle's Law and makes up part of the ideal gas law.

When the volume of a gas shrinks, the gas molecules have less space to move around and so they hit their container.

Explanation

1+2+3+4+5+6+7+8+9+10 = 55 multiply by 7 = 55x7 = 385 as 10 units so divide by 10 to find averages value= 385/10=38.5.

Explanation

Let quantity of water to be added further be x litres.

Then, milk : water =                       40                           .

20 + x

Now,                     40                           =             1

20 + x    2

 20 + x = 80

 x = 60.

Quantity of water to be added = 60 litres.

 

Explanation

Let the original money be Rs.100,

then money spent on machinery = Rs. 35

Money spent on raw material = Rs. 40

Money spent on staff = Rs. 10

Money left = 100 - 85 = Rs. 15

If money left is Rs. 15, original money = 100

If money left is 60000, original money =10015×60000=400000

Hence the total money spent on machinery and raw material =400000×75%=Rs.300000

Explanation

To solve this problem, follow these steps:

1Determine the rate at which one boy assembles machines:

• 15 boys assemble 30 machines in 1 hour.
• Therefore, 1 boy assembles 30 machines/15  boys = 2 machines per hour

Calculate the number of machines 48 boys can assemble in 1 hour:

• Each boy assembles 2 machines per hour
• Therefore, 48 boys×2 machines per boy=96 machines per hour.

Find out how many machines can be assembled in 40 minutes:

40 minutes is  40/ 60 = 2/3of an hour.

Therefore, in 40 minutes, the number of machines assembled is:

96 machines per hour× 2/3of an hour=64 machines

Explanation

Let the required weight be xkg.Less weight,less cost(DirectProportion)∴250:200::60:x⇒250×x=200×60⇒x=200×60250⇒x=48

Explanation

There is a meal for 200 children

150 children have taken the meal

Remaining meal is to be catered to 50 children

Now,

200 children = 120 men

∴ 50 children

=(120200×50)men=30 men