What is the unit of relative density?
1). kg/m
2). kg/m2
3). kg/m3
4). It has no unit
25% discount is offered on an item. By applying a promo code the customer wins 4% cash back. What is the effective discount?
1). 28 percent
2). 29.12 percent
3). 29 percent
4). 5 percent
If curved surface area of a cylinder is 1386 sq cm and height is 21 cm, what will be its radius? (Take π = $\frac{22}{7}$)
1). 21 cms
2). 5.25 cms
3). 10.5 cms
4). 15.75 cms
Value of ($4a^{2}$ + 12ab + $9b^{2}$) (2a + 3b) is
1). 2a - 3b
2). 2a + 3b
3). 2a
4). 3B
In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average
weight of the boys of the class?
1). 72
2). 73
3). 69
4). 71