Question

The chapter "Review 5" has question no. 1 on page no. 35. Explain/Solve.

Answer 1

a)
Length × Breadth × Height = Volume

Area of base × Height = Volume

Height	= $\frac{7200}{800}$
	= 9 cm

Edge = $\boxed{9}$ cm

b)
Length × Breadth × Height = Volume

Length	= $\frac{315}{9\times 7}$
	= 5 cm

Edge = $\boxed{5}$ cm