Question

mathematics class 7 NCERT​

Answer 1

Step-by-step explanation:

1. perimeter of a rectangle=2X(L+B)

= 2X(40+20)

=2X60

=120cm

3. perpendicular=12m

hypotenuse=15m

From Pythagoras Theorem, Base²=hypotenuse²-perpendicular²

B²=15²-12²

B²=225-144

B²=81

B=√81

B=9

According to question,

a=8m

hope it helps u

Answer 2

Step-by-step explanation:

hope it's helps you

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