Question

a pineapple costs 7 each. A watermelon costs 5 each. if a man spends 38 ruppes on these fruits then what is the number of pineapple purchased by him ?​

Answer 1

Answer:

he would have got 5 pineapples and he would have got3 rupees return because 1 pineapple is 7rupees.

Step-by-step explanation:

if we divide and see it self we will get the answer

Answer 2

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Let the number of pineapples and watermelons be x and y respectively.

Then, 7x + 5y = 38 or

5y = (38 - 7x) or

y = 38 - 7x 5

Clearly, y is a whole number, only when (38 - 7x) is divisible by 5.

Clearly, y is a whole number, only when (38 - 7x) is divisible by 5.This happens when x = 4.