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7) Let the number be x
According to the problem
7x=12x-35
=> 12x-7x=35
=> 5x=35
=>x=35/5
=>x=5
Answer :
x=5
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9) Present Age of rahul's sister= x years
Present of Rahul= x-6 years
After 10 years:
Age of rahul's sister= x+10 years
Age of Rahul= (x-6)+10 years
According to the problem
x+10+ (x-6 )+10=30
2x+14=30
2x=30-14=16
×=16/2=8
Answer:
Present age of Rahul's sister is 8 years
and Present age of Rahul is (8-6)years =2 years
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10) Let the breadth be x
Length=x+5
Perimeter=38 cm
According to the problem
2(x+x+5)=38
2(2x+5)=38
4x+10=38
4x=38-10=28
x=28/4=7
Answer:
Breadth of the rectangle is 7cm and Length is (7 + 5) cm = 12cm
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