Question

Case Study based Questions.

Q.49 Seema is habitual of saving her pocket money. She collected some 50 paise and 25

paise coins in her piggy bank. If she collected `25 and number of 50 paise coins is

double the number of 25 paise coins.

(i) How many coins of 50 paise did she collect?

(a) 30 coins (b) 20 coins (c) 50 coins (d) 40 coins

(ii) How many coins of 25 paise did she collect?

(a) 20 coins (b) 10 coins (c) 15 coins (d) 40 coins

(iii) If Seema collected `100 then how many coins of 25 paise did she collect?

(a) 30 coins (b) 40 coins (c) 80 coins (d) 90 coins

(iv) If she collect 20 of each type then total money in piggy bank is —

(a) `15 (b) `25 (c) `50 (d) `35​

Answer 1

According to the question,

Let the number of 25 Paise coin = 2x

Therfore,

Number of 50 paise coin = 2x

Total money = Rs 25 =25×100=2500 paise

25x+100x=2500 paise

125x=2500 paise

x=

125

2500

=

5

100

=20

Since,

x=20

Number of 25 paise coin=x= 20

Number of 50 paise coin =2x = 2×20=40