Advertisements
Advertisements
प्रश्न
Half of a herd of deer are grazing in the field and three fourths of the remaining are playing nearby. The rest 9 are drinking water from the pond. Find the number of deer in the herd.
Advertisements
उत्तर
Let the number of deer be x.
Number of deer grazing in the field = `x/2`
Number of deer playing nearby = `3/4 xx "Number of remaining deer"`
`= 3/4 xx (x - x/2) = 3/4 xx x/2 = (3x)/8`
Number of deer drinking water from the pond = 9
`x - (x/2 + (3x)/8) =9`
`x - ((4x + 3x)/8) = 9`
`x - (7x)/8 = 9`
`x/8 = 9`
Multiplying both sides by 8, we obtain
x = 72
Hence, the total number of deer in the herd is 72.
संबंधित प्रश्न
Amina thinks of a number and subtracts `5/2` from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?
Sum of the digits of a two digit number is 9. When we interchange the digits it is found that the resulting new number is greater than the original number by 27. What is the two-digit number?
One of the two digits of a two digit number is three times the other digit. If you interchange the digit of this two-digit number and add the resulting number to the original number, you get 88. What is the original number?
Shobo’s mother’s present age is six times Shobo’s present age. Shobo’s age five years from now will be one third of this mother’s present age. What are their present ages?
Hasan buys two kinds of cloth materials for school uniforms, shirt material that costs him Rs 50 per metre and trouser material that costs him Rs 90 per metre. For every 2 meters of the trouser material he buys 3 metres of the shirt material. He sells the materials at 12% and 10% profit respectively. His total sale is Rs 36660. How much trouser material did he buy?
A grandfather is ten times older than his granddaughter. He is also 54 years older than her. Find their present ages
Aman’s age is three times his son’s age. Ten years ago he was five times his son’s age. Find their present ages.
Arjun is twice as old as Shriya. Five years ago his age was three times Shriya’s age. Find their present ages.
In a 2 digit number, the units place digit is x. If the sum of digits be 9, then the number is (10x – 9).
