Question

you are sumit/ sumitra , a librarian in kv palam. write a letter to the sales manager of usha publications ltd., kolkata placing an order for the books that you wish to purchase for your school library. also ask for the discount permissible on the purchase​

Answer 1

Explanation:

PQ=

d

2

−(r

1

−r

2

)

2

PQ=

8

2

−2

2

PQ=7.75cm

Draw a line segment AB=15cm. Draw circle C1 with radius 4cm and centre as A. Draw circle C2 with radius 2cm and centre B

Draw circle C3 with radius (R

1

−R

2

=4−2=2cm and centre A. B is the external point to circle C3. Draw perpendicular bisector of AB and mark its midpoint M

With M as centre and AM as radius construct a circle C4

C4 cuts C3 at two points E and F. Join AE and AF

Extend AE to meet C1 at P and AF to meet C1 at R

Draw BQ∥AP and BS∥AR

Join PQ and RS. PQ and RS are required direct tangents.

Answer 2

Answer:

Explanation:

PQ=

d

2

−(r

1

−r

2

)

2

PQ=

8

2

−2

2

PQ=7.75cm

Draw a line segment AB=15cm. Draw circle C1 with radius 4cm and centre as A. Draw circle C2 with radius 2cm and centre B

Draw circle C3 with radius (R

1

−R

2

=4−2=2cm and centre A. B is the external point to circle C3. Draw perpendicular bisector of AB and mark its midpoint M

With M as centre and AM as radius construct a circle C4

C4 cuts C3 at two points E and F. Join AE and AF

Extend AE to meet C1 at P and AF to meet C1 at R

Draw BQ∥AP and BS∥AR

Join PQ and RS. PQ and RS are required direct tangents.