### Global Statistics

All countries
42,026,831
Confirmed
Updated on October 23, 2020 8:04 am
All countries
30,717,388
Recovered
Updated on October 23, 2020 8:04 am
All countries
1,143,225
Deaths
Updated on October 23, 2020 8:04 am

### Global Statistics

All countries
42,026,831
Confirmed
Updated on October 23, 2020 8:04 am
All countries
30,717,388
Recovered
Updated on October 23, 2020 8:04 am
All countries
1,143,225
Deaths
Updated on October 23, 2020 8:04 am

# A Pineapple Costs Rs. 7 Each. A Watermelon Costs Rs. 5 Each. X Spends Rs. 38 on those Fruits. The Number of Pineapples Purchased is?

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## Explanation

• A pineapple costs Rs. 7 each.
• A watermelon costs Rs. 5 each.
• X spends Rs. 38 on those fruits.

Let suppose “p” denotes pineapple and “w” denotes watermelon.

Now;

7p + 5w = 38

7p = 38 – 5w

p = (38 – 5w)/7

Clearly, p is a whole number only when (38 – 5w) is divisible by 7. This happens when w = 2 (and p = 4).

## To Find

Number of pineapples purchased = ?

## Solution

Let suppose “p” denotes pineapple and “w” denotes watermelon.

Now according to the given condition;

7p + 5w = 38

7p = 38 – 5w

p = (38 – 5w)/7

Suppose w = 0

p = (38 – 0)/7 = 38/7 (p is not a whole number here)

Suppose w = 1

p = (38 – 5)/7 = 33/7 (p is not a whole number again)

Suppose w = 2

p = (38 – 10)/7 = 4 (that’s the result we want)

Number of pineapples purchased = 4 answer

## Conclusion

A pineapple costs Rs. 7 each. A watermelon costs Rs. 5 each. X spends Rs. 38 on those fruits. The number of pineapples purchased are 4.

### A Man has Some Hens and Cows. If the Number of Heads be 48 and the Number of Feet Equals 140, then the Number...

What are you looking for? Let’s dig in quickly Explanation Solution Explanation

### In a Group of Buffaloes and Ducks, the Number of Legs are 24 More than Twice the Number of Heads. What is the Number...

What are you looking for? Let’s dig in quickly Explanation Solution Explanation

### If 2 Tables and 3 Chairs Cost Rs. 3500 and 3 Tables and 2 Chairs Cost Rs. 4000, then How Much does a Table...

What are you looking for? Let’s dig in quickly Explanation Solution Explanation

### A Man has Some Hens and Cows. If the Number of Heads be 48 and the Number of Feet Equals 140, then the Number...

What are you looking for? Let’s dig in quickly Explanation Solution Explanation

### In a Group of Buffaloes and Ducks, the Number of Legs are 24 More than Twice the Number of Heads. What is the Number...

What are you looking for? Let’s dig in quickly Explanation Solution Explanation

### If 2 Tables and 3 Chairs Cost Rs. 3500 and 3 Tables and 2 Chairs Cost Rs. 4000, then How Much does a Table...

What are you looking for? Let’s dig in quickly Explanation Solution Explanation
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