Granite is an example of .....

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RRB Non Technical Exam (Secunderabad) 2016 click here to view all questions

Granite is an example of .....

AMetamorphic rock

BSedimentary rock

CIgneous rock

DArtificial stone

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The area of the base of a rectangular tank is 6500 cm^2 and the volume of water contained in it is 2.6 cubic metres. The depth of the water tank is-

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The area of the base of a rectangular tank is 6500 cm^2 and the volume of water contained in it is 2.6 cubic metres. The depth of the water tank is-

A2.5 metre

B3 metre

C5.5 metre

D4 metre

rahim ? Jan 8 '2020 at 10:32

Correct answer is: 4 metre

Explanation:

\(l \times b = 6500 \text{ cm}^2 = 0.65 \text{ m}^2\)
\(l \times b \times h = 2.6 \text{ m}^3\)
\(0.65 \times h = 2.6\)
\(h =\frac{2.6}{0.65}\)
\(h = 4m\)

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Two angles are complementary, if the sum of their measures is-

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Two angles are complementary, if the sum of their measures is-

A90°

B100°

C180°

D360°

raju ? Jan 8 '2020 at 7:49

Correct answer is :90°

Explanatopn:

(i) If two angles are complementary, then the sum of their measures is 9090.

(ii) If two angles are supplementary, then the sum of their measures is 180180.

(iii) Two angles forming a linear pair are supplemetary.

(iv) If two adjacent angles are supplementary, they form a linear pair.

(v) If two lines intersect at a point, then the vertically opposite angles are always equalequal.

(vi) If two lines intersect at a point, and if one pair of vertically opposite angles are acute angles, then the other pair of vertically opposite angles are obtuseobtuse.

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The sides of a triangle are in the ratio of 1/2 : 1/3 : 1/4. If its perimeter is 52 cm, the length of the smallest side is :

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The sides of a triangle are in the ratio of 1/2 : 1/3 : 1/4. If its perimeter is 52 cm, the length of the smallest side is :

A9 cm

B10 cm

C11 cm

D12 cm

rihad ? Jan 8 '2020 at 10:44

Correct answer is: 12 cm

Explanation:

\(\text{Let the sides be } \frac{1}{2}x, \frac{1}{3}x,\frac{1}{4}x\)

\(\text{Perimeter }= a+b+c\)

\(52cm = \frac{1}{2}x+\frac{1}{3}x+\frac{1}{4}x\)
 
\(52cm= \frac{(6x+4x+3x)}{12}\)

\(52= \frac{13}{12}x\)

\(\frac{52\times12}{13}=x\)

\(4\times12=x=48\)

\(\text{Sides are }\frac{1}{2}\times48=24cm;\)
\(\frac{1}{3}\times48=18cm;\)
\(\frac{1}{4}\times48=12cm\)

\(\therefore \text{12 cm is the smallest side}\)

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The radius of the wheel of a vehicle is 70 cm. The wheel makes 10 revolutions in 5 seconds. The speed of the vehicle is-

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The radius of the wheel of a vehicle is 70 cm. The wheel makes 10 revolutions in 5 seconds. The speed of the vehicle is-

A29.46 km/ hr

B31.68 km/ hr

C36.25 km/ hr

D32.72 km/ hr

raju ? Jan 8 '2020 at 10:50

Correct answer is : 31.68 km/hr

Explanation:

Circumference = 2πr
\(= 2 \times \frac{22}{7} \times \text{70 cm}\)
= 440 cm

Distance travelled in 10 revolutions = 440 x 10 cm
= 4400 cm
= 44 m

\(\therefore Speed = \frac{distance}{time} \)

\(= \frac{44}{5} \text{ m/sec}\)

\(= \frac{44}{5} \times \frac{18}{5} \text{ km/hr} \)

\(= 31.68 \text{ km/hr}\)

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A train 132 metre long passes a telegraph post in 6 seconds. The speed of the train is-

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A train 132 metre long passes a telegraph post in 6 seconds. The speed of the train is-

A70 km/ hr

B72 km/ hr

C79.2 km/ hr

D80 km/ hr

raju ? Jan 8 '2020 at 10:54

Correct answer is: 79.2 km/ hr

Explanation:

 

Speed =  \(\frac{132}{6} \text{ m/sec} \)

\(\Big(22\times \frac{18}{5}\Big) km/hr \)

79.2 km/hr

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Two pipes can fill a tank in 20 minutes will 30 minutes respectively. If both the pipes are opened simultaneously, then the tank will be filled in-

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Two pipes can fill a tank in 20 minutes will 30 minutes respectively. If both the pipes are opened simultaneously, then the tank will be filled in-

A10 minutes

B12 minutes

C15 minutes

D25 minutes

rashmi ? Jan 8 '2020 at 13:33

Correct answer is:12 minutes

Explanation:

In this type of questions we first get the filling in 1 minute for both pipes then we will add them to get the result, as

Part filled by A in 1 min = \(\frac{1}{20}\)
Part filled by B in 1 min = \(\frac{1}{30}\)

Part filled by (A+B) in 1 min = \(\frac{1}{20} + \frac{1}{30}\)
\(= \frac{1}{12}\)

So both pipes can fill the tank in 12 mins.

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