In 15 days, the earth picks up 1.2 x `10^8` kg of dust from the atmosphere. In how many days it will pick up 4.8 x `10^8` kg of dust?

In 10 days, the earth picks up 2.6 xx 10^8 pounds of dust from the atmosphere. How much dust will it pick up in 45 days?

Suneeta can embroider a saree in 15 days. Her sister-in-law Abha can do the job in 10 days. They start embroidering the saree together, but two days later Abha gives up the work and goes to her parents. In how many days will Suneeta finish the remaining work of embroidering the saree?

5 men can complete a job in 8 days. How many days will it take if 12 men do the job?

How many moles of water molecules are present in 3.8 x 10^(-8) g of water?

In how many ways can a committee of 8 be chosen from 10 individuals?

A can finish a piece of work in 15 days and B can do it in 10 days. They worked together for 2 days and then B goes away. In how many days will A finish the remaining work ?

Spinning 3 hours daily, Kanta can spin 2 kg cotton-balls in 12 days. Spinning 4 hours daily, how many days will she take to spin 10 kg cotton balls?

A gobar gas plant produces methane and supplies to the families. If a family requires 15,000 kJ of energy per day, how many days will the quote of 10 kg will last ? (Delta_(c)H "of" CH_(4) = - "1665 kJ "mol^(-1))

Assuming the mass of the earth as 6.64xx10^(24) kg Kg and the average mass of the atoms that make up the earth as 40 u ( atomic mass. Unit ) , the number of atoms in the earth is approximately

Find the distance of a point from the earth's centre where the resultant gravitational field due to the earth and the moon is zero. The mass of the earth is 6.0xx10^24 kg and that of the moon is 7.4x10^22 kg. The distance between the earth and the moon is 4.0xx10^5km .