Question

No.6,8 with deatail.Solve it plz plz plz plz​

Answer 1

Answer:

6)

Given-

490 = 70% of x

70/100 × x = 490

or 7x = 490×10

7x= 4900

x =4900/7

=700

Therefore the maximum marks is 700.

8)

10% of Calcium= 10/100 × 1000 = 100 g

3% of Carbon = 3/100 × 1000 = 30 g

12% of oxygen = 12/100 × 1000= 120 g

We're using 1000 here bcoz, 1 kg = 1000g, and the answer is required in grams.