Question

The area of a rectangular hall is 80 sq.m. If it is 8 m wide, then it
must be
long.
a) 12 m
b) 4 m
c) 10 m
d) 5 m​

Answer 1

Answer:

Let the length be = x

$\color{black}\boxed{\colorbox{saffron}{Area - length×breadth}}$

$80 = x \times 8 \\ \\ \frac{80}{8} = x \\ \\ = x = 10m$

So, length= 10m

Answer 2

Area of rec = l*b

80m² = l*8

80m²/8 = l

l = 10m

option c