Question

answer these questions with explanation

Answer 1

Answer:

(1)

dimension of pool=400cm×300m

=400cm×30000cm

=12000000sq.cm

dimension of tile=25cm×8cm

=200sq.cm.

number of tiles required= 12000000÷200

=60000

(2)

her mother age =X+30 years

(3)

(a)

her grandmother's age=6×y=6y

(b)

her mother's age=3×y+4

=3y+4

(4)

Area of room=5cm×5cm

=25sq.cm

cost of flooring it = 25×12.5

=Rs.312.5

(5)

distance cover by Rohan =3(Perimeter of Square park)

=3(4×200m)

=3×800 m

=2400m

distance covered by Arun=4(Perimeter of Rectangular park)

=4(2{150+100}m)

=4(2×250m)

=4×500m

=2000m

so Rohan cover more distance by 400 m