Size of a tile is 9 inches by 9 inches. The number of tiles needed to cover a floor of 12 feet by 12 feet is
Length of floor = 12 feet
Breath of floor = 12 feet
So Area of floor = 12 x 12 = 144 feet
Area of tile = 9/12 x 9/12 = 9/16 feet
So the number of tile = 144 9/16 = 256 tiles
Twenty litres of a mixture contains milk and water in the ratio of 5:3. If four litres of this mixture is replaced by 4 litres of milk, then the ratio of the milk to that of the water in the new mixture will be
Milk in twenty litres of a mixture = 5 /8 x20 = 12.5 lit
Water in four litres of a mixture = 5 /8 x 4 = 2.5 lit
Milk in new mixture = 12.5  2.5 + 4 = 14 lit
water in this mixture = 6 lit
∴ Ratio = 14 6 = 7 : 3
A sum of money is distributed amongst A,B and C in the proportion 1 2 , 1 3 and 1 4 respectively. A gets Rs 4,000 more than that of B. The sum of money to be distributed was
LCM (2, 3, 4) = 12
⇒ 1/ 2 : 1 /3 : 1 /4 = 6 : 4 : 3
Also,
A = B + 4000
⇒ 6x  4x = 4000
⇒ 2x = 4000
⇒ x = 2000
Total money = 6x + 4x + 3x = 13x = 13(2000)
= Rs 26000
A sum of money becomes 41/ 40 of itself in 1 4 year at a certain rate of simple interest. The rate of interest per annum is
In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
I. 6p^{2} + 5p + 1 = 0
II. 20q^{2} + 9q =  1
In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
I. 3p^{2} + 2p  1 = 0
II. 2q^{2} + 7q + 6 = 0
3P^{2} + 2P  1 = 0
or 3P^{2} + 3P  P  1 = 0
or 3P (P + 1)  1(P + 1) = 0
or (P + 1) (3P  1) = 0
or P =  1, 1/3
2q^{2} + 7q + 6 = 0
or 2q^{2} + 4q + 3q + 6 = 0
or 2q (q + 2) + 3 (q + 2) = 0
or (2q + 3) (q + 2) = 0
or q =  9/2 or q =  2
∴ P is greater than q
The graph shows the number of deaths from road accidents occured during rainy season of 1992.
Between which two consecutive weeks was the rise in the number of deaths greatest ?
The graph shows the number of deaths from road accidents occured during rainy season of 1992.
In how many weeks were there more than 150 deaths ?
Study the given graphs and table, and answer the following questions given below.
Approximately what is the total number of iterate people in Maharastra and Karnataka together ?
Study the given graphs and table, and answer the following questions given below.
Approximately what will be the percentage of the total male in U.P., Maharastra and Kerala of the total population of the given states ?
Marks obtained by six students in different subjects
What is the average percentage of marks obtained by the students in Science ? (rounded off to be the nearest integer)
Marks obtained by six students in different subjects
What is the overall percentage of marks obtained by 'B' in all subjects together (rounded off to two digits after decimal) ?
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