411.
If A : B = 2 : 3 and B : C = 7 : 8, find A : C.
(A)
(B)
(C)
(D)
412.
The value of a machine depreciates every year by 5%. If the present value of the machine is ₹80,000, what will be its value
after 2 years?
(A)
₹72,200
(B)
₹74,400
(C)
₹74,000
(D)
₹72,000
413.
A man can row a boat at speed 8 km/h in still water. It takes thrice as long to row upstream as it does to row downstream.
Find the speed of the stream (in km/h).
(A)
5
(B)
4
(C)
6
(D)
3
414.
The inner and outer radii of a hemispherical wooden bowl are 6 cm and 8 cm, respectively. Its entire surface has to be
polished and the cost of polishing π cm2 is Rs.50. How much will it cost to polish the bowl?
(A)
Rs.12,000
(B)
Rs.10,000
(C)
Rs.11,600
(D)
Rs.11,400
415.
Which of the following statements is INCORRECT about the circle?
(A)
(B)
(C)
(D)
416.
Ram is 20 years older than Rahul. ‘n’ years ago Ram was thrice as old as Rahul. ‘2n’ years from now the ratio of the ages of
Ram and Rahul will be 15 : 11. What is the value of ‘n’?
(A)
15
(B)
10
(C)
30
(D)
20
417.
The distance between the centres of two circles is 81 cm, and their radii are 42 cm and 51 cm. What is the length (in cm) of
the direct common tangent to the circles?
(A)
(B)
(C)
(D)
418.
In an election contested by two candidates, one candidate got 42% of the total votes and still lost by 800 votes. Find the
total number of votes that were cast.
(A)
7000
(B)
2000
(C)
8000
(D)
5000
419.
In an election a candidate secured 47% of the votes and lost to his only opponent by 276 votes. Find the total number of
votes polled.
(A)
4000
(B)
4200
(C)
4600
(D)
3800
420.
What is the value of the following expression?
