If a sum of money double itself in 8 years, then the interest rate in percentage is
10%
D.
Let the principal be Rs. 100, Thus, Amount would be Rs. 200
Interest = Amount - Principal = Rs. 200 - Rs. 100 = Rs. 100
A and B undertake a piece of work for ₹ 250/-. A alone can do that work in 5 days and B alone can do that work in 15 days. With the help of C, they finish the work in 3 days. If everyone gets paid in proportion to work done by them, the amount C will get is:
₹ 50/-
₹ 100/-
₹ 150/-
₹ 200/-
A.
₹ 50/-
A's 1 day's work =
B's 1 day's work =
(A + B + C)'s 1 days work =
C's 1 day's work:
Ratio of workdone by A, B and C:
If then is equal to
2201
2203
2207
2213
C.
2207
If then A
As then
Similarly,
Similarly,
Points P, Q and R are on a circle such that and . Then the subtended angle by arc QR at the centre is:
80°
120°
140°
160°
D.
160°
In ΔPQR,
The subtended angle (QOR) by arc OR at the centre
Dealer purchased an article for ₹ 900/- and fixes the list price in such a way that he gains 20% after allowing 10% discount, then the list price is
₹ 1,180/-
₹ 1,080/-
₹ 1,200/-
₹ 1,100/-
C.
₹ 1,200/-
Let the marked price be ₹ x
We know that,
If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is
2 hours
3 hours
4 hours
7 hours
C.
4 hours
Distance = 100 km
Speed of boat in still water = 20 km/hr
Speed of current = 5 km/hr
Relative speed = (20 + 5)km/hr = 25 km/hr
Required Time
In the last financial year, a car company sold 41800 cars. In this year, the target is to sell 51300 cars. By what percent must the sale be increased?
D.
Required percentage
Cost price of 28 articles is equal to Sale price of 21 articles, then percentage of profit is
12%
20%
22%
B.
Cost Price 28 = S.P. 21
Required Percentage
The ratio of the angles of a triangle is . Then the smallest angle is:
C.
Sum of angles of triangle = 180°
Ratio = 3 : 2 : 9
∴ Smallest angle
If (x - 5)^{2} + (y - 2)^{2} + (z - 9)^{2} = 0, then value of (x + y - z) is
16
-1
-2
12
C.
-2
(x - 5)^{2} + (y - 2)^{2} + (z - 9)^{2} = 0
⟹ (x - 5)^{2} = 0
x - 5 = 0, x = 5
Similarly,
y = 2, z = 9
∴ x + y - z
= (5 + 2 - 9) = 7 - 9 = -2
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