Three solid cubes of sides 1 cm, 6 cm and 8 cm are melted to form a new cube. Find the total surface area of the cube so formed

The speed of three cars are in the ratio 5:4:6. The ratio between the time taken by them to travel the same distance is 

What is the value of 3+4[4-{13-4(7+2)+6}+9]

If the numerator of a fraction is increased by 15% and its denominator is diminished by 8%, then the value of the new fraction is 15/16. Find the original fraction.

Find the value of (1-1/3)(1-1/4)(1-1/5)...(1-1/100)

H.C.F. of 9/10, 12/25, 18/35 and 21/40 is