Question

7. The salary of an employee is increased by 20%. By what percentage should the new salary be reduces
restore the original salary?
8. Out of his total monthly income Mr. Moti Lal spends 20% on house rent and 60% of the rest on househol
expenses. If he saves 2520 per month, what is his total monthly income?
9. Anil obtained 375 marks out of 500 in an examination while Sunil obtained 420 marks out of 600. Whose
performance is better?
10. A school has 1800 students on its roll, 40% of whom are girls. How many boys are there in the school
11. A number is increased by 10% and then decreased by 10%. Find the net increase or decrease per cent
12. The price of sugar has risen by 20%. By how much per cent must a housewife reduce her consumption
of sugar, so that the expenditure remains same.
13. A's income is 20% more than that of B. How much per cent is the income of B less than that of A?
14. An ore contains 18% of copper. How many kg of the ore are required to get 63 kg of copper?
15. The value of a car decreases annually by 20%. If the present value of the car is 3,45,000, what will
be its value after 2 years?​

Answer 1

Answer:

The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

Answer 2

Answer:

A cell wall is an outer layer surrounding certain cells that is outside of the cell membrane. ... The cell wall provides strength and structural support to the cell, and can control to some extent what types and concentrations of molecules enter and leave the cell.