Question

two people a and b weight 50 kg and 60 kg respectively. if ,each month , a gains 20 % of their weight in the previous month and b gains 30% of their weight in the previous month , what will be the difference between their weight after 3 months ?
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Answer 1

pls refer to the attachment for the ans

Answer 2

Answer:

difference between their weights after 3 months is 45.42kg

Step-by-step explanation:

weight of A after 1 month is 120% from previous

so,     50 x 120/100 = 60kg

after 2 month,

now the weight is 60kg    so,   60 x 120/100  = 72kg

after 3 month,

now the weight is 72kg   so,  72 x 120/100 = 86.4kg

weight of B after 1 month is 130% from previous

so,    60 x 130/100 = 78kg

after 2 months,

78 x 130/100 = 101.4kg

after 3 months,

101.4 x 130/100 = 131.82kg

difference between their weight  = 131.82 - 86.4

                                                       = 45.42kg

                                           OR

for after first month of A

20% of 50 = 20 x 50/100 = 10kg

10 kg is added to its previous weight  so weight after 1 month = 50+10  = 60kg

Similarly you can get others from this method also

HOPE IT HELPS

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