3.
मेरे चाचा की वर्तमान उम्र मेरी बहन की वर्तमान उम्र से दो गुना है। 10 वर्ष पहले चाचा की उम्र बहन की उम्र
की तीन गुनी थी। समीकरण बनाकर उनकी वर्तमान उम्र बतायें।
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Answer:
Age of sister = 20
Age of uncle = 40
Step-by-step explanation:
Let the age of sister is = x
Let the age of uncle is = 2x
Before 10 years
Age of sister is = x-10
Age of uncle is = 2x-10 or 3(x-10)
Now, 2x-10 = 3(x-10)
2x-10 = 3x-30
By shifting
30-10 = 3x-2x
x = 20
By putting the value of x
Age of sister is 20
Age of uncle is = 2x =2×20 = 40
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