Instructions

For the following questions answer them individually

Question 81

In a joint business, A invests â‚¹ 20,000 for six months while B invested certain amount for the whole year. In the yearâ€”end profit of â‚¹ 9,000 the share of A is â‚¹ 6,000. The amount(in rupees) invested by is

Question 82

Pipes A, B, C canfill a tank individually in 2 hours, 3 hours and 4 hours respectively. All the three are opened for 15 minutes and pipe C is closed. The time (in minutes) required furtherto fill the tank is

Question 83

Pipes A and canfill a tank in 9 minutes and 12 minutes respectively. A is opened and after sometime B is opened; and the tank is full in 4 minutes. The time difference (in minutes) between the opening of A and is

Question 84

Three trains A, B and C moving at speeds $$s_1, s_2$$ and $$s_3$$ respectively take times $$t_1, t_2$$ and $$t_3$$ respectively to cover a distance of x kms. If $$t_1 : t_2 : t_3 = 20 : 15 : 12$$, then $$s_1 : s_2 : s_3 = ...........$$

Question 85

The time (in seconds) taken by a train of 240 metres long travelling at 70 kmphto cross another train of length 110 metres standing on a parallel track is

Question 86

10 men and 15 women can complete a work in 6 days; and 12 men and 27 women can complete the same work in 4 days. The number of days required for 2 men and 12 women to complete the same work is

Question 87

A and B can doa work in 8 hours; B and C can complete the same work in 6 hours while C and A require 12 hours to complete that work. The time required by C alone to complete that work is

Question 88

The area of a square S is equal to the area of the rectangle of sides 56 metres and 14 metres. The length (in metres) of diagonal of S is

Question 89

The area of a rhombus is 144 square units. If one of its diagonals is 18 units then the length of the other diagonal (in units) is

Question 90

A brick measures 20 cms x 10 cms x 7.5 ems. The number ofbricks required to build a wall of dimensions 25 m x 2 m x 0.75 m is