Question

If Raju have 36 hamburgers and he eats half of them in one hour, then his dog eats half of what was left in one hour, how many hamburgers do he have left?​

Answer 1

Answer:

Raju is left with 9 hamburgers

Step-by-step explanation:

Given :-

No. of hamburgers Raju had = 36

Hamburgers he ate = 1/2 of 36

Hamburgers he's dog ate = 1/2 of 1/2 * 36 [ as remaining = 1/2 of 36 ]

To find:

Hamburgers left = ?

Solution :

Let's take 36 as 1 whole

so, 36 - 1/2 of 36 = 1 - 1/2 = 2-1/2 = 1/2

so the remaining hamburgers = 1/2 * 36

so, no. of hamburgers the dog ate = 1/2 * 1/2 [ considering 36 as whole ]

                                                          = 1/4 of 36

hence, total no. of hamburgers ate = 1/2 + 1/4 = 3/4

so, no. of hamburgers remaining = 1 - 3/4  = 1/4

hence total no. of hamburgers remaining = 1/4 * 36 = 9

there's one more easier method where you first calculate the no. of hamburgers ate by Raju[ 1/2 * 36 = 18] first and then by his dog[ 1/4 * 36 = 9 ]

then add them [ 18 + 9 = 27 ] and then subtract the sum from 36 [ 36 - 27 = 9]