A boy want to make a cuboid of dimension 5m, 6m, 7m from small cubes of .04 m3. Later he realized he can make same cuboid by making it hollow. Then it takes some cubes less. What is the no. of these cubes?  Select:
A) 2150  B) 2250  C) 2350  D) 2850  E) 3250
volume of cuboid=5*6*7= 
<gadget id="calculator">5*6*7</gadget>
<output>210</output>
210m3   volume of inner cuboid=(5-1)*(6-1)*(7-1)= 
<gadget id="calculator">(5-1)*(6-1)*(7-1)</gadget>
<output>120</output>
120m3   therefore,volume of hollow cuboid=210-120= 
<gadget id="calculator">210-120</gadget>
<output>90</output>
90 m3   no of cubes required=90/.04= 
<gadget id="calculator">90/.04</gadget>
<output>2_250</output>
2250 cubes   ANSWER:2250
<result>B</result>
A boy want to make a cuboid of dimension 5m, 6m, 7m from small cubes of .04 m3. Later he realized he can make same cuboid by making it hollow. Then it takes some cubes less. What is the no. of these cubes?