Mathematics mcqs

a boat covers a distance of 30 km in 2 ½ hours running downstream while returning it covers the same distance in 3 ¾ hours. what is the speed of the boat in still water?

a boat covers a distance of 30 km in 2 ½ hours running downstream while returning it covers the same distance in 3 ¾ hours.

8km/hr

12km/hr

none of these

14 km/hr

a began a business with rs. 85,000. he was joined afterwards by b with rs. 42,500. for how much period does b join, if the profits at the end of the year are divided in the ratio of 3 : 1?

a began a business with rs. 85,000. he was joined afterwards by b with rs. 42,500.

8 months

6 months

4 months

5 months

a and b working separately can do a piece of work in 9 and 12 days respectively. if they work for a day alternately. if a begins first, in how many days the work will be completed ?

a and b working separately can do a piece of work in 9 and 12 days respectively. if they work for a day alternately.

none of these

41/4 days

55 days

42/4 days

a and b walk around a circular track. a and b walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. if they start at 8 a.m. from the same point in opposite directions, how many times shall they cross each other before 9.30 a.m.?

a and b walk around a circular track. a and b walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. if they start at 8 a.m.

5

8

6

7

a and b together take 6 days to complete a task. b and c together take 12 days to complete the same task. a and c together take 8 days to complete it. if a, b and c are working together, how long does it take for them to complete the task?

a and b together take 6 days to complete a task. b and c together take 12 days to complete the same task. a and c together take 8 days to complete it.

4 days

4(2/3) days

1(1/3) days

5(1/3) days

a and b together can complete a work in 1.2 days,. a alone can complete it in 20 days. if b does the work only for half a day daily, then in how many days a and b together will complete the work ?

a and b together can complete a work in 1.2 days,. a alone can complete it in 20 days.

15 days

11 days

10 days

20 days

a and b start a business jointly. a invests rs.16000 for 8 months and b remains in the business for 4 months. out of the total profit b claims 2/7th sharhow much money is contributed by b?

a and b start a business jointly. a invests rs.16000 for 8 months and b remains in the business for 4 months.

rs.6000

rs.10000

rs.12800

rs.8000

a and b put in rs.300 and rs.400 respectively into a business. a reinvests into the business his share of the first year’s profit of rs.210 where as b does not. in what ratio should they divide the second year’s profit?

a and b put in rs.300 and rs.400 respectively into a business.

39:40:00

40:39:00

4:03

3:04

a and b invests rs.8000 and rs.9000 in a business. after 4 months, a withdraws half of his capital and 2 months later, b withdraws one-third of his capital. in what ratio should they share the profits at the end of the year?

a and b invests rs.8000 and rs.9000 in a business.

32:45:00

34:43:00

20:23

37:45:00

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