Question

1. The length, breadth and thickness of a metal block is 31. given byl=9cm, b8 em, t=2.45 cm. The volume of the block is ​

Answer 1

Explanation:

Volume calculation

Volume of the block, V=l×b×t

=12×6×2.45cm

3

=1.764×10

2

cm

3

Step2: Rounding off the volume according to significant figures

For multiplication, the least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Since the minimum number of the significant figures is 1 in width (6cm), therefore the volume will also contain only 1 significant figure.

Therefore, rounding off the volume (1.764×10

2

cm

3

) to 1 significant figure, we get

V=2×10

2

cm

3

Hence, Option B is the correct answer.

Answer 2

Answer:

l × b× h

try this formula

for answer