Question

A 5 kilometre long drain is to be covered with concrete slabs each of length 20cm. find how many slabs will be needed to cover drain. Also find the total cost of the slabs if the cost of one slab is Rs.60

Answer 1

1km=1000m
1m=100cm
1km=1000×100cm
5km=5×100000cm=500000
1slab=20cm
500000cm=500000÷20=25000slabs
1slab=Rs60
25000slab=25000×60=Rs1500000

Answer 2

1 km = 1000m
1 m = 100cm
1 km = 1000*100 = 100000cm
5 km = 5*100000 = 500000cm
1 slab = 20cm
500000 / 20 = 25000 slabs
1 slab =Rs. 60
Slabs=25000
So,25000*60
=1500000/-

If right then mark me it as brainliest.