Question

4 years. Find the ages of Subbu and Tobu.
12. The length of a rectangle is 6 cm more than its breadth. If the perimeter of the records
60 cm, find its length and breadth. Also find its area
13. There are some 50 p coins and ? I coins in a bag. If the coins are equal in number and
bae​

Answer 1

Answer 12.

let breadth be xcm

then length is (x+6)cm

now perimeter=2(l+b)

but perimeter is 60(given)

this 2(l+b)=60

now 2(x+6+x)=60cm

now 2(2x+6)=60çm

now 4x+12=60cm

4x=60-12=48cm

4x=48cm x=(48/4)cm=12cm

now breadth=12cm

and lenght=x+6=12+6=18cm

now area= l×b= 12×18=216cm2

Answer 13.

let the number of 50 paisa coin = n

let the number of 1 rupee coin = n

50 paisa = x

1 rupee = y

now,

nx + ny = 300

n ( x + y ) = 300

n ( y/2 + y ) = 300

n ( 3y/2) = 300 ( as x = y/2)

n = 300 × 2/3 ( putting y = 1 )

n = 200.

Answer 2

Answer:

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