Question

20. Five times the price of a peni
the pen.
at of
2r. The number of boys in a school is 334 more than the number of girls. If the total strength of
the school is 572, find the number of girls in the school.
22. The length of a rectangular park is thrice its breadth. If the perimeter of the park is 168
metres find its dimensions.
perimeter of the​

Answer 1

Answer:

21.i didnt solve it

Step-by-step explanation:

first subtract 334 from 572 then divide the remainder by two you will get your ans for sure

Answer 2

Answer:

20. Five times......pen ?

Sol;- Let the price of pen ne x

5 times pen = 5 × x = 5x. ans.....

21. the no. of.........in the school ?

Sol;- Total Strength of the School = 572

Let the no. of girls be x

The no. of boys be (x+334)

A.T.Q.

x+x+334 = 572

=> 2x = 572-334

=> x = 238/2

Therefore, no. of girls in the school = 238/2

= 119. ans......

22. The Length of......its dimensions ?

Sol;- Let the breadth of rectangular park be x m

The Length of rectangular park be x × 3 = 3x m

Perimeter of park = 168 m

A.T.Q.

2(l+b) = Perimeter of rectangle

=> 2(3x+x) = 168 m

=> 2(4x) = 168 m

=> 8x = 168 m

=> x = 168/8 m

=> x = 21 m.

Therefore,

Breadth of rectangle = x = 21 m.

Length of rectangle = 3x = 3×21 m = 63 m.

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