$5m*5m$

$10m*5m$

$15m*5m$

$20m*5m$

D. $20m*5m$

From the question, 2b+l = 30

=> l = 30-2b

$Area=100{m}^{2}\phantom{\rule{0ex}{0ex}}\Rightarrow l\times b=100\phantom{\rule{0ex}{0ex}}\Rightarrow b\left(30-2b\right)=100\phantom{\rule{0ex}{0ex}}{b}^{2}-15b+50=0\phantom{\rule{0ex}{0ex}}\Rightarrow \left(b-10\right)\left(b-5\right)=0$

b = 10 or b = 5

when b = 10 then l = 10

when b = 5 then l = 20

Since the garden is rectangular so we will take value of breadth 5.

So its dimensions are 20 m * 5 m

15,000

15,500

15,600

16,500

55 m

56 m

57 m

58 m

$5m*5m$

$10m*5m$

$15m*5m$

$20m*5m$

2400 sq.cm

2480 sq.cm

2560 sq.cm

None of these

20000

23000

25000

26000

3410

3420

3430

3440

$153500{m}^{2}$

$152500{m}^{2}$

$153800{m}^{2}$

$153600{m}^{2}$

18750 sq.m

37500 sq.m

40000 sq.m

48000 sq.m

$44\%$

$45\%$

$34\%$

$35\%$

46 sq.ft

81 sq.ft

126 sq.ft

252 sq.ft

$84feet$

$88feet$

$85feet$

$89feet$

7 cm

7.1 cm

7.2 cm

7.3 cm

27%

28%

29%

30%

$24cm$

$26cm$

$23cm$

$28cm$

110 cm

115 cm

120 cm

125 cm

200cm

150cm

180cm

100cm

40 m

50 m

120 m

None of these

${m}^{2}$

1520${m}^{2}$

2420${m}^{2}$

2480${m}^{2}$

2520$4:15$

$4:25$

$3:15$

$3:25$

614

714

814

914

$17meter$

$23meter$

$20meter$

$25meter$

50 cm

64 cm

124 cm

120 cm