30 MATHEMATICS

EXAMPLE 2 Ramesh solved

2

7 part of an exercise while Seema solved

4

5

of it. Who

solved lesser part?

SOLUTION In order to find who solved lesser part of the exercise, let us com-

pare

2

7 and

4

5.

Converting them to like fractions we have,^210

735

 ,

428

535

.

Since10 < 28 , so

10 28

35 35

.

Thus,

(^24) <
75.
Ramesh solved lesser part than Seema.
EXAMPLE 3 Sameera purchased 312 kg apples and
43
4 kg oranges. What is the
total weight of fruits purchased by her?
SOLUTION The total weight of the fruits 34kg^13
24



719 1419
kg kg
24 4 4

 

33 1
kg 8 kg
44

EXAMPLE 4 Suman studies for
52
3 hours daily. She devotes
24
5 hours of her time
for Science and Mathematics. How much time does she devote for
other subjects?
SOLUTION Total time of Suman’s study =
52
3 h =
17
3 h
Time devoted by her for Science and Mathematics =
24
5 =
14
5 h