2. Questions Bank
  3. 7th Class
  4. Mathematics
  5. Perimeter and Area

7th Class Mathematics Perimeter and Area Question Bank Perimeter and Area

  • question_answer
    The length around a rectangular mat is                                                                                                              \[21\text{ }m\] . If its length is                                                                                                               \[5\text{ }m\]                                                                                                              \[60\text{ }cm,\] what is its width?

    A)  4m 90 cm             

    B)         490m

    C)  49m                     

    D)         49cm

    Correct Answer: A

    Solution :

    Perimeter                                                                                            \[=21\text{ }m=2100\text{ }cm\] Length                                                                           \[=5\text{ }m\text{ }60\text{ }cm=560\text{ }cm\] Width                                                                                                            \[=\frac{P}{2}-l\]                 x                                                                                     \[=\left( \frac{2100}{2}-560 \right)\,cm\]                                                                           \[=490\text{ }cm=4\text{ }m\text{ }90\text{ }cm\]


You need to login to perform this action.
You will be redirected in 3 sec spinner