30 monkeys went to a picnic. 25 monkeys chose to irritate cows while 20 chose to irritate buffaloes. How many chose to irritate both buffaloes and cows?

If 21 cows eat as much as 15 buffaloes.how many cows will eat as much as 35 buffaloes?

If 21 cows eat as much as 15 buffaloes,how many cows will eat as much as 35 buffaloes? 45 (b) 4956 (d) 54

A man bought a buffalo and a cow for Rs. 2600 . He sold the buffalo at a profit of 25% and the cow at a profit of 20% . In this way, his total profit was . 23 1/13 % Find the cost price of the buffalo and cow.

Grass in a lawn grows equally thick and at a uniform rate.It takes 24 days for 70 cows and 60 days for 30 cows to eat the whole of the grass.How many cows are needed to eat the grass in 96 days? (a) 18 (b) 20 (c) 24 (d) 36(e) None of these

On a certain pasture the grass grow at an even rate. It is known that 40 cows can graze on it for 40 days before the grass is exhausted, but 30 cows can graze there for as long as 60 days. How many days would the pasture last if 20 cows were to graze on it ?

Rajesh want to chose a best plan for his mobile phone. He has 2 options available with him. The first plan of company A, cost Rs 20 per month, with costing an additional 25 paise per minute. The second plan of company B charge Rs 40 per month, but calls cost 8 paise per minute. These two situations are shown below in the form of linar equations. The total cost of the two company's are given as : y =0.25 x + 20 and y = 0.8x + 40 Where, x is the minutes used any y is the total cost per month. If Rajesh decides to take first plan and calls for 90 minutes in a month, then how much amount he will have to pay ?