Question

a farmer want to dig a well either in the form of cuboidal shape of 1.5m × 1.5m × 7m or in the cylindrical shape of radius 75cm and and height 7m the rate of digging a well is rs 75 per m cube calculate the cost of digging the well in both cases

Answer 1

Volume of cube=l×b×h×cost= rate of digging
Volume of cylinder=Pi×r^2×h×cost=rate of digging

Answer 2

Answer:

solution : - Given : dimension of cuboid 1 m 1 m 7 m

And

Diameter of cylinder 1 m so , radius = 12 m and Height of cylinder = 7 m

As given Rate of dig the well is Rs . 50 per m3 , So that means here rate of per cubic meter , So we find volume of each type of well , As :

i ) Cost of digging well in form of cuboid = Volume of cuboid Rate per m3

We know Volume of cuboid = Length Breadth Height

So,

Volume of cuboid = 1 1 7 = 7 m3

So,

Cost of digging well in form of cuboid = 7 50 = Rs. 350

And

Cost of digging well in form of cylinder = Volume of cylinder Rate per m3

We know Volume of cylinder = πr2h

So,

Volume of cylinder =2271212722455m3

So,

Cost of digging well in form of cylinder = 5.5 50 = Rs. 275

ii ) By choosing shape of well is cylinder , Ramlal savied his money by doing so ramlal shows that saving money is good .

hope it helps you..