Question
After 7 years Sarosh's father's age will be 3 times that of Sarosh's age which will be equal to 6 times of Sarosh's present age. What is the sum of their present ages? [4 MARKS]
Answer:
:
Framing of equation: 1 Mark
Steps: 2 Marks
Result: 1 Mark
Let Sarosh's present age be x
After 7 years, Sarosh's age will be x+7
Father's age after 7 years is 3(x+7)
This is equal to 6 times Sarosh's present age =6x
So, 6x=3(x+7)=3x+21
⇒6x=3x+21
⇒6x−3x=21
⇒3x=21
⇒x=213=7
Sarosh's present age is 7 years.
Father's age after 7 years is 6×7=42years
His present age is 42−7=35years
Sum of their present ages =35+7=42years
Was this answer helpful ?
:
Framing of equation: 1 Mark
Steps: 2 Marks
Result: 1 Mark
Let Sarosh's present age be x
After 7 years, Sarosh's age will be x+7
Father's age after 7 years is 3(x+7)
This is equal to 6 times Sarosh's present age =6x
So, 6x=3(x+7)=3x+21
⇒6x=3x+21
⇒6x−3x=21
⇒3x=21
⇒x=213=7
Sarosh's present age is 7 years.
Father's age after 7 years is 6×7=42years
His present age is 42−7=35years
Sum of their present ages =35+7=42years
Was this answer helpful ?
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