Question

3
5
3
15
Q.13 Bhanu bought 7 kg 120 g of apples, 5 Kg 850 g of grapes and 4 Kg 280 g
of mangoes. Find the total weight of all the fruits he bought.
Q.14 How many grams of sugar must be added to 7.45 Kg to make it 22.5 Kg.?
Q.15 Mrs. Bajaj bought 8-litres of milk. Out of this,5-litres was consumed.
How much milk is left with her ?
4.
Q.16 How many natural numbers are there from 2 to 20. What fraction of
them are prime numbers.​

Answer 1

Q.13 17kg 250g

7kg 120g apples = 7120g

5kg 850g grapes=5850g

4kg 280g mangoes=4280

7120g+5850g+4280g =17250g

17250g=17kg 250g

The total weight of fruits he brought is 17kg 250g

Q.14 convert kg into grams

7.45kg=7450g

22.5kg=22500g

Let the grams of sugar added be x

7450g+x=22500g

x=22500g-7450g

x=15050g

15050 grams of sugar must be added 7.45kg

Q.15 Mrs.Bajaj bought 8 litres

Mrs.Bajaj consumed 5 litres

8litres-5litres=3 litres

3 litres of milk is left with her

Q.16 The natural numbers from 2 to 20 are 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 17,18,19,20

There are 19 natural numbers from 2 to 20

prime numbers from 2 to 20 are 2,3,5,7,11,13,17,19

There are 8 prime numbers