A and B can together do a piece of work in 6 days and A alone can do it in 9 days. The number of days B will take to do it alone is

• 18 days

• 24 days

• 9 days

• 9 days

52.

The length of the two parallel sides of a trapezium are 16m and 20 m respectively. If its height is 10 m, its area in square metres is:

• 360

• 260

• 240

• 240

A discount series of 15%, 20% and 25% is equal to the single discount of

• 48%

• 49%
  
  

• 50%

• 50%

Rs.490 is divided among A, B and C such that A's share is half that of B's and thrice that of C's. What is C's share?

• Rs 49

• Rs 147

• Rs 294

• Rs 294

A dealer sold an article at 6% loss. Had he sold it for Rs 64 more, he would have made a profit of 10%. Then the cost of the article is

• Rs.400

• Rs.200

• Rs.164

• Rs.164

There are 1400 students in a school, 25% of those wear spectacles  of those wearing spectacles are boys. How many girls in the school wear spectacles?

• 250

• 100

• 200

• 200

A man can row upstream at 12 km/hr and downstream at 18 km/hr. The man's rowing speed in still water is

• 15 km/hr

• 5 km/hr

• 3 km/hr

• 3 km/hr

If ab = 21 and  then value of  is

• 115

• 121

• 125

• 125

The value of  would be

• 

• 1

• 0

• 0

Possible measures of three angles of a triangle are

• 33°, 42°, 115°

• 40°, 70°, 80°

• 30°, 60°, 100°

• 30°, 60°, 100°