Question

16)
(x) 1 = 28, S = 144 और कुल 9 पद हैं। व ज्ञात कीजिए।​

Answer 1

Answer:

Answer-

Side of square = 18cm

Area of square path = 18cm×18cm = 324cm²

Side of tile = 3cm

Area of one tile = 3cm × 3cm = 9cm²

number of tiles can be laid =

= \frac{area \: of \: path}{area \: of \: tile}=

areaoftile

areaofpath

= 324 cm / 9cm

= 36

36 tiles can be laid

Answer 2

सही प्रश्न :- L = 28, S = 144 और कुल 9 पद हैं। a ज्ञात कीजिए ?

उतर :-

हम जानते है कि,

• S(n) = (n/2)[a + L]
• n = कुल पद
• a = पहला पद
• L = आखिरी पद

दिया हुआ है कि,

• S(n) = 144
• n = 9
• L = 28

अत, मान रखने पर,

→ S(n) = (n/2)[a + L]

→ 144 = (9/2)[a + 28]

→ 144 * 2 = 9(a + 28)

→ 288 = 9a + 252

→ 9a = 288 - 252

→ 9a = 36

→ a = 4 (Ans.)

इसलिए a का मान 4 होगा ll

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