If a cone of radius 3.5 cm and height 9.6 cm is melted and constructed into a cylinder of the same radius, what will be the height of this cylinder? (Take π =$\frac{22}{7})$.
1). 3.2 cm
2). 6.4 cm
3). 1.6 cm
4). 4.8 cm
What is the unit of the physical quantity 'Young's modulus'?
1). newton
2). erg
3). joule
4). pascal
Which are the oldest mountains in India?
1). Western Ghats
2). Satpura Range
3). Aravallis
4). Eastern Ghats
The ratio of present ages of Ratnabali and Shaukat is 8:5. After 22 years the ratio of their ages will be 10:9. At present, what is Ratnabali's age?
1). 5
2). 14
3). 81
4). 8
A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 4 days. How long B alone would take to do the whole
work?
1). 12.5 days
2). 100 days
3). 22.5 days
4). 35 days