Question

7.a) Express the rupees using decimals
(1) 85 P 2) 52 Rupees 75 paise
b)Express kilometers using decimals
(1) 415 m
(ii) 50 km, 70 m
8. There are 24 boys and 16 girls in a class. What is the ratio of:
(1) Boys to Girls
(ii) Girls to Boys
(iii) Boys to the total students of the Class

9.(a) Find the perimeter of a rectangle if its area is 195 cm and breath
is 12cm.
b)Find the perimeter of a rectangular field whose length is 22m and area is 176 sq.m.
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Answer 1

Answer:

q6

1) -9-3-18

= -12 -18

= -30

draw -30 on a number line.

2)2⅘ + 3½ + ¾

= 14/5 + 7/2 + ¾

L.C.M of 2 and 4 = 4

= 14/5 + 14/4 + ¾

= 14/5 + 17/4

lcm of 5 and 4 = 20

= 56/20 + 85/20

= 56+85/20

= 141/20

converting 141/20 into a mixed fractio which is

= 7 1/20

3) 39/5 -23/5

= 16/5

= 3 ⅕

4) 225.8003

5) 973.761

6) 4(1)² - 12(1)(2) + 9(2)²

= 4 - 24 - 36

= -20-36

= -56

7)(a) (i) 85p

1 ₹ = 100p

= 85/100

= 0.85 ₹

(ii) 52 + 0.75

= 52.75 ₹

(b)(i) 0.415 km

(ii) 50.07 km

8) (i) 24:16

= 12:8

= 6:4

= 3:2

(ii) 16:24

= 2:3

(iii) 24: 40

= 6:10

= 3:5

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