Mohita's mother was 21 years of age when she was born while her father was 38 years old when her brother ten years younger to her was born. What is the difference between the ages of her parents?
OPtion
1) 7.5 Year
2) 8.5 Years
3) 11 Years
4) 12 Years
5) 6 Years
6) 10 Years
7) 9 Years
8) 8 Years
9) 7 Years
10)None of these
Solution
Age of Mohita's mother when Mohita was born = 21
Age of Mohita's father when Mohita was born = 38โ10 =28
Required difference of age =28โ21= 7 Years
P can do a work in 19 days. Q can do the same work in 9.5 days and R can do the same in 28.5 days. Q and R start the work and leave after 3 days. P finishes the remaining work in X days. What is the value of X?
OPtion
1) 10.5 days
2) 9.5 days
3) 11.0 days
4) 12.0 days
5) 12.5 days
6) 10.0 days
7) 11.5 days
8) 13.0 days
9) 9.0 days
10) None of these
Solution
Amount of work done by Q and R in 3 days = 3*(1/9.5 + 1/28.5) = 3*4/28.5 = 3*8/57 = 8/19
Amount of work remaining after 3 days = 11/19
Amount of work done by P in 1 day = 1/19
So for 1/19 work P takes 1 day
Hence for 11/19 work P would take (1/(1/19))*11/19 = 11 days
The marked price of a shirt is Rs.1250. A shopkeeper offers 10% discount on this shirt and then again offers 20% discount on the new price, and then and then again offers 30% discount on the new price . How much will you have to pay, finally?
2 solid spheres of radius 3 m, 3 solid cylinder of radius 2 m, height 3 meter and 2 solid cones of radius 2 m, height 4 m are melted to form a bigger solid sphere. What is the radius of this bigger solid sphere in meters?
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