In an organization of pollution control board, engineers are represented by a circle, legal experts by a square and environmentalist by a triangle. Who is most represented in the board as shown in the following figure ?

[B].

[C].

[D].

Answer: Option C

Explanation:

Net ascent of the monkey in 1 hour = (30 – 20) feet = 10 feet.

So, the monkey ascends 90 feet in 9 hours i.e. till 5 p.m.

Clearly, in the next 1 hour i.e. till 6 p.m. the monkey ascends remaining 30 feet to touch the flag.

[B].

[C].

[D].

Answer: Option A

Explanation:

Clearly, we have :

A = B – 3 …(i)

D + 5 = E …(ii)

A+C = 2E …(iii)

B + D = A+C = 2E …(iv)

A+B + C + D + E=150 …(v)

From (iii), (iv) and (v), we get: 5E = 150 or E = 30.

Putting E = 30 in (ii), we get: D = 25.

Putting E = 30 and D = 25 in (iv), we get: B = 35.

Putting B = 35 in (i), we get: A = 32.

Putting A = 32 and E = 30 in (iii), we get: C = 28.