Question

2. There are 12000 soldiers in an army,
some of whom are Indians and the rest
are European. The average height of a
European soldier is 1.80 m, that of an
Indian soldier is 1.75 m, and the length
47
of the entire army is 1 m. So, how
60
much are the Indian soldiers ?
(B) 8000
(A) 6000
(C) 1000
(D) 4000​

Answer 1

Step-by-step explanation:

Correct Option: A

Let the number of members of Indian army be n.

∴ Number of European army = 12000 – n.

According to the question,

⇒ 5

9

× n + 5

10

× (12000 - n)

12 12

12000

= 5 39

48

⇒ 69n + 70 × 12000 - 70n

12 12 12

= 279 × 12000

12

⇒ 69n + 840000 – 70n = 837000

⇒ n = 840000 – 837000 = 3000

Answer 2

Step-by-step explanation:

CORRECT OPTION = A

Hope it helps you