Question

A hall 40m long, 15m high and 20m broad is to be paved with stones each measuring 5m x 4m x 3m. What is the number of stones required?

Answer 1

Area of Verandah=l×b

Area of Verandah=40×15=600m  

2

 

Area of each stone=6dm×5dm=30dm  

2

=30×10  

−2

m  

2

 

Number of stone =  

Areaofeachstone

AreaofVerandah

​

 

Number of Stones=  

30×10  

−2

 

600

​

 

Number of stones=2000

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Answer 2

Answer:

Area of hall =l×b

                                             2

Area of hall =40×15=600m  

                                                              2

Area of each stone=6dm×5dm=30dm  

          −2    2

=30×10  m  

 

Number of stone =  

Area of each stone

Area of hall

​

                                  600        −2

Number of Stones=  30×10  

​

 Number of stones=2000