Question

The number of planes of dimensions 4m×5m×20m that can be stored in a pit of dimensions 60m×40m×12m is​

Answer 1

STEP BY STEP EXPLANATION:

Area of pit (assumed rectangular) = l×b×h = 60×40×12 = 28800

Area of planes = 4×5×20 = 400

No of planes can be stored in pit = Area of Pit ÷ Area of planes

= 28800 ÷ 400 = 72

Answer 2

Step-by-step explanation:

The number of planks of dimensions (4 m x 50cm x 20cm) that can be stored in a pit which is 16 m long, 12 m wide and 40 m deep is

(a) 1900

(b) 1920

(c) 1800

(d) 1840

Thinking Process

1.Firstly, determine the volume of plank and volume of pit by using the formula = l x b x h

2.Further, find the ratio of the volume of pit to the volume of the plank, to get the number of planks.