A can finish a work in 7 days. B can finish the same work in 9 days. The days required to finish the work by both of them together
If the successive discounts be 20%, 10% and 5%, then the single equivalent rate of discount is
31.6%
31.5%
31%
31.4%
A.
31.6%
Single equivalent =
Single equivalent 20% and 10%
Single equivalent 28% and 5%
The ratio of number of boys and girls in a school of 720 students is 7 : 5. How many girl should be admitted to make the ratio 1 : 1.
90%
120%
220%
240%
The selling price of 6 bananas is equal to the cost price of 8 bananas. Then the percentage of profit is
20%
25%
30%
A basket contains 300 mangoes. 75 mangoes were distributed among some students. Find the percentage of mangoes left in the basket.
70%
72%
76%
75%
A man goes to a place on bicycle at speed of 16 km/hr, and comes back at lower speed. If the average speed is 6.4 km/hr in total, then the return speed (in km/hr) is
10
8
6
4
The simple interest on a certain sum of money at the rate of 5% per annum for 8 years is â¹ 840/-. Rate of interest for which the same amount of interest can be received on the same sum after 5 years is
7%
8%
9%
10%
O is the ortho-centre of Δ ABC, and if ∠BOC = 110°, then ∠BAC will be
110°
70°
100°
90°