Question

1/2×b×31.4=1256 .what is the value of b​

Answer 1

Answer:

Step-by-step explanation:

1/2 × b × 31.4 = 1256

1/2 × 31.4b = 1256

15.7b = 1256

____ ____

15.7 15.7

b=80

Answer 2

Answer:

b=80mm

Step-by-step explanation:

Height =h

=31.4mm

Base=b

=?

Given,

Area of ABC=1256mm²

1/2×b×h=1256

1/2×b×31.4=1256

b=1256×2/31.4

b=1256×2×1/31.4

b=1256×2×10/314

b=1256×10/157

b=1256/157×10

b=8×10

b=80mm